单项选择(15分)
21. money, we had to abandon the project.
A.Lack B.For lack of C.Short D.Be short of
22.When people cut down big trees,new trees should be planted. ,they will have no trees to cut down in the future.
A.If not B.If so C. If not so D.If don’t
23.It a lot of courage to admit you are wrong.
A.takes B.needs C.requires D. demands
21. money, we had to abandon the project.
A.Lack B.For lack of C.Short D.Be short of
22.When people cut down big trees,new trees should be planted. ,they will have no trees to cut down in the future.
A.If not B.If so C. If not so D.If don’t
23.It a lot of courage to admit you are wrong.
A.takes B.needs C.requires D. demands

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