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高二上册单项选择一百题
1. The smoke should be made ____ before it goes into the air.
A.to be clean B.clean C.to be cleaning D.cleaning
2. Can you imagine _______ a physicist?
A.for him to become B.for him becoming C.him becoming D.him to become
3.--Would you mind my opening the window?--_________.
1. The smoke should be made ____ before it goes into the air.
A.to be clean B.clean C.to be cleaning D.cleaning
2. Can you imagine _______ a physicist?
A.for him to become B.for him becoming C.him becoming D.him to become
3.--Would you mind my opening the window?--_________.
