非谓语动词的恰当形式填空：

The library is ________(close)on weekends．

非谓语动词的恰当形式填空：

The experience ________(gain)will be of great value to us．

非谓语动词的恰当形式填空：

These seats are ________(reserve)for you．

非谓语动词的恰当形式填空：

Don’t drink the ________(pollute)water．

非谓语动词的恰当形式填空：

There is a car ________(park)outside the house．