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用所给词的适当形式填 用所给词的适当形式填空. 1.Our headmaster invited a singer __

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用所给词的适当形式填
用所给词的适当形式填空.
1.Our headmaster invited a singer ________ (sing) for us this morning.
2.I _______ (clean) my room at 9:00 last Sunday.
3.They can do that thing by ________ (they).
4.I think _______ (predict) the future is a bit difficult.
5.The teacher told us that light ________ (travel) much faster than sound.
用所给词的适当形式填 用所给词的适当形式填空. 1.Our headmaster invited a singer __
1.to .sing
2.was cleaning
3.themselves
4.predicting
5.travels