A.easy to make a sufferer lonely |
B.common but hard to deal with |
C.severe throughout the world |
D.widespread only in the USA |
A.a(chǎn) waste of money | B.a(chǎn) quick repair | C.a(chǎn)n easy way out | D.a(chǎn) cheap aid |
A.a(chǎn)sk people with sleep problems to try and use Somnapure |
B.introduce a kind of medicine to help sleep better |
C.draw people’s attention to the bad effects of the lack of sleep |
D.talk about what the main causes of the sleep problems are |
A.the instructions to take Somnapure |
B.the side effects of Somnapure |
C.the price of Somnapure |
D.the way to get Somnapure |
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A.the change of color in locusts |
B.the protective coloration of animals and pests |
C.how a certain sea fish protects itself |
D.a(chǎn)nimals or pests can dye themselves different colors |
A.a(chǎn)nimals; they are powerful enough |
B.beasts; they are dangerous to their enemies |
C.pests; they take on the same colors as crops |
D.birds; they fly very fast |
A.can’t be seen | B.can be seen | C.can’t move | D.can’t change |
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A.No one has come to disturb you. |
B.Everything is so quiet and calm around you. |
C.The book you are reading is so interesting and attractive. |
D.Your book is overdue; you are finishing it at a very fast speed. |
A.They resemble human friends exactly. |
B.They are unfamiliar types we like. |
C.They never desert us. |
D.They never hurt our feelings. |
A.Your wish to visit some far-off place can be realized through the pages of the books. |
B.To escape from the dull realities of everyday life you should take up reading. |
C.Books can always help you to live a colorful life. |
D.You may obtain valuable experience from reading good books. |
A.“to attract someone’s attention” |
B.“to distract someone’s attention” |
C.“to make someone very tired” |
D.“to make someone interested” |
A.in books the world is more accessible to us |
B.we can ask to go anywhere in the world |
C.we can make a claim to everything in this world |
D.we can make a round-the-world trip free of charge |
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A.some old persons with heart attack |
B.some old persons with a fever |
C.children over twelve years old |
D.neither adults nor heart attack |
A.have twice a day |
B.have about more than fourteen pills a day |
C.have four times a day |
D.have nine pills a day |
A.All of them. | B.Three kinds of medicine. |
C.Two kinds of medicine. | D.Almost not any medicine. |
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A.why the roots of plants grow into the soil but not above it |
B.how the roots of plants grow into the soil but not above it |
C.the process of plants growth |
D.a(chǎn) growth control system of plants |
A.RHD2 takes calcium from the soil, which makes hairs grow, and produce RHD2 and take more calcium |
B.Roots take RHD2 and calcium from the soil and produce RHD2 |
C.Roots make hairs grow, and produce RHD2, and take more calcium |
D.RHD2 takes protein, which makes hairs grow, and produce RHD2, and take more calcium |
A.hairy rooted crops can grow better in unfriendly environments |
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A.flower, water and air | B.water, sunlight and air |
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A.plants are important for life |
B.plants cannot grow without air |
C.there are many plants in the world |
D.we can not live without water |
A.Of all living things animals are most important |
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A.a(chǎn) medicine book | B.a(chǎn) novel |
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A.damaged | B.polluted | C.prevented | D.guarded |
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A.have been put into use |
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B.Ways to deal with future problems |
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D.Making Full Use of Our Limited Land |
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