1、【题目】How long ________ they ________ (dig) the ditch?

答案：

have … been digging

解析：

暂无解析

1、【题目】He asked me whether my brother ________ (fly) to Beijing.

答案：

had flown

解析：

暂无解析

1、【题目】“Haveyoumovedintothenewflat?”“Notyet.Therooms________(paint).”

答案：

解析：

1、【题目】Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.

答案：

解析：

1、【题目】I shall never forget ________ (meet) the late Premier Zhou during his inspection of our factory.

答案：

meeting

解析：

暂无解析

1、【题目】“Have you moved into the new flat? ” “Not yet. The rooms ________ (paint). ”

答案：

are being painted

解析：

暂无解析

1、【题目】Thosewho’dliketovisittheexhibition________(sign)yournameshere.

答案：

解析：

1、【题目】He fell asleep immediately last night; he must ________ (be) very tired.

答案：

have been

解析：

暂无解析

1、【题目】Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.

答案：

解析：

1、【题目】We were busy ________ (get) things ready for the trial production when he phoned us.

答案：

getting

解析：

暂无解析

1、【题目】heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.

答案：

解析：

1、【题目】Night ________ (fall), we hurried home.

答案：

falling

解析：

暂无解析

1、【题目】I wonder if he could get it ________ (do) before tomorrow.

答案：

done

解析：

暂无解析

1、【题目】________(catch)intherain,hewaswettotheskin.

答案：

解析：