Question

The student worked ________, but, to our disappointment, he still failed in the final examination．

1. A.
   as hard as possible
2. B.
   as hard as possibly
3. C.
   as hard as he can
4. D.
   so hard as he could

Answer 1

A
表達“盡可能……”時，可用“as…as possible”或“as…as sb．can/could”。從本句中動詞所表示的時間來看，結構中應用過去時態(tài)，故排除C項。