he teacher told them since light ________ (travel) faster than sound,lightning ________ (appear) to go before thunder.
travels, appears
暂无解析
Heaskedmewhethermybrother________(fly)toBeijing.
Thefloordoesnotlooksobadwhen________(sweep)clean.
Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice
Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.
Ifound________toanswerallthequestionswithinthetimegiven.
