题目内容
选择括号内恰当的单词或词组填入空白处,使句意完整、正确。
86.Are you going to (join / take part in)the school rowing club?
87.I think the computer is (used / useful).
88.I spent two hours (sweep / sweeping)the house yesterday.
89.The house is so expensive that I can’t (share / afford)it.
90.Even scientists aren’t sure (if / whether)or not there are UFOs.
86. join 87. useful 88. sweeping
89. afford 90. whether
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