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：
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