﹣Why are the windows so dirty?
﹣Because we __________ them for a long time.
A. have cleaned         B. haven’t cleaned         C. didn’t clean
B

試題分析: 句意：為什么窗戶(hù)那么臟？因?yàn)槲覀兒荛L(zhǎng)時(shí)間沒(méi)清潔了。for a long time很長(zhǎng)時(shí)間，for加時(shí)間表一段時(shí)間，用于現(xiàn)在完成時(shí)，窗戶(hù)臟的原因是沒(méi)有清潔，故選B.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語(yǔ) 來(lái)源：不詳 題型：單選題

Trees and flowers ________every year to make our country more beautiful.
A．is plantedB．was plantedC．a(chǎn)re plantedD．were planted

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：單選題

When I got home last night, my parents ____ for me at the table.
A．waitB．waitedC．were waitingD．have waited

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：單選題

They_________ all their money, so they have to walk home now.
A. spend     B. will spend      C. have spent       

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：單選題

----When __________ they leave here ? ----Next Monday.
A．doB．willC．doesD．a(chǎn)re.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：單選題

—Jim, could you tell me if you _____________ our party tomorrow?
—I think I will if I _____________ free.
A．will take part in, will be B．take part in, am
C．will take part in, amD．would take part in, will be

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：單選題

The students told us _____________last summer vacation.
A．where did they campB．where will they camp
C．where they campedD．where they will camp

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：單選題

---Have you seen Dr. Adams recently?
---No. He __________ Hong Kong for an important meeting. He’ll come back tomorrow.
A．has gone inB．has been inC．has gone toD．has been to

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：單選題

— 　　　　 you see the film Journey to the West yesterday?
—Yes. But the film 　　　　 for 5 minutes by the time I got there.
A．Do; had begunB．Do; had been on
C．Did; had begunD．Did; had been on

查看答案和解析>>

同步練習(xí)冊(cè)答案