1、【题目】Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.

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1、【题目】Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.

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

答案：

have … been digging

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暂无解析

1、【题目】A beam of light will not bend round corners unless ________ (make) to do so with the help of a reflecting device

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made

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暂无解析

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

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1、【题目】Iwonderifhecouldgetit________(do)beforetomorrow.

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1、【题目】Howlong________they________(dig)theditch?

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1、【题目】Night________(fall),wehurriedhome.

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1、【题目】he teacher told them since light ________ (travel) faster than sound,lightning ________ (appear) to go before thunder.

答案：

travels, appears

解析：

暂无解析

1、【题目】Matteristhename________(give)toeverythingwhichhasweightandoccupiesspace.

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

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