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】I wonder if he could get it ________ (do) before tomorrow.
答案：
done
解析：
暂无解析
1、【题目】Matteristhename________(give)toeverythingwhichhasweightandoccupiesspace.
答案：
解析：
1、【题目】Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice
答案：
解析：
1、【题目】________(catch)intherain,hewaswettotheskin.
答案：
解析：
1、【题目】Herefusedtotelluswhetherhe________(undertake)thejob.
答案：
解析：
1、【题目】heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
答案：
解析：
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