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】________ (catch) in the rain, he was wet to the skin.
答案：
Caught (Having been caught,Being caught)
解析：
暂无解析
1、【题目】heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
答案：
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】Heaskedmewhethermybrother________(fly)toBeijing.
答案：
解析：
1、【题目】Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.
答案：
解析：
1、【题目】Night________(fall),wehurriedhome.
答案：
解析：
1、【题目】Wewerebusy________(get)thingsreadyforthetrialproductionwhenhephonedus.
答案：
解析：
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