1 . ①There were so many cars held up by the heavy rain on the road that we had no alternative but to wait.
②We can do nothing but to give up.
③He was noticed to leave the office.
④The city now is much noisier than it used to be.
⑤My mother wouldn’t let me to go to see the film.
1. 以上句子中，加黑部分应省略的是：______
2. 不能省略的是：______
②We can do nothing but to give up.
③He was noticed to leave the office.
④The city now is much noisier than it used to be.
⑤My mother wouldn’t let me to go to see the film.
1. 以上句子中，加黑部分应省略的是：
2. 不能省略的是：
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