问题标题：
初二英语语法题四道〔1〕Wehavenoproblems____(work)itout.[2]Therewasnotimeforher____(open)thebox.[3]Thereisnothingforhim____(worry)about.[4]Allthefood____(be)onthetablenow.请留下正确的答案．最
问题描述：
初二英语语法题四道
〔1〕Wehavenoproblems____(work)itout.
[2]Therewasnotimeforher____(open)thebox.
[3]Thereisnothingforhim____(worry)about.
[4]Allthefood____(be)onthetablenow.
请留下正确的答案．
最关键的是,我需要较为详细的解析．
李云松回答：
workinghaveproblemdoingsomething做什么事有困难
toopenhavetimetodosth.有时间做.
toworrysomethingforsomeonetoworryabout有.值得某人焦虑
isfood不可数,所以用单数is
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