1、【题目】________(fail)severaltimes,theyneedsomeencouragement.
答案：
解析：
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】The floor does not look so bad when ________ (sweep) clean.
答案：
swept
解析：
暂无解析
1、【题目】Herefusedtotelluswhetherhe________(undertake)thejob.
答案：
解析：
1、【题目】Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.
答案：
解析：
1、【题目】________(catch)intherain,hewaswettotheskin.
答案：
解析：
1、【题目】Thefloordoesnotlooksobadwhen________(sweep)clean.
答案：
解析：
1、【题目】Heaskedmewhethermybrother________(fly)toBeijing.
答案：
解析：
1、【题目】Howlong________they________(dig)theditch?
答案：
解析：
1、【题目】Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.
答案：
解析：
邮箱： 