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

答案：

解析：

1、【题目】A great number of small power stations ________ (set up) in their county since liberation.

答案：

have been set up

解析：

暂无解析

1、【题目】Howlong________they________(dig)theditch?

答案：

解析：

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

答案：

have … been digging

解析：

暂无解析

1、【题目】Matter is the name ________ (give) to everything which has weight and occupies space.

答案：

given

解析：

暂无解析

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】Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.

答案：

解析：

1、【题目】Thefloordoesnotlooksobadwhen________(sweep)clean.

答案：

解析：

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

答案：

falling

解析：

暂无解析

1、【题目】The director recommended that she ________ (study) more English before going abroad.

答案：

study

解析：

暂无解析

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】heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.

答案：

解析：