1. The pianos in the other shop will be ____,but ______ [ ]

30．When you finish your work, don’t forget to put the tools back where they ________

Mrs Zhang always asks us to_____conversations in the English classes.

In the park , the number of the visitors is tightly ____ to avoid damaging the environment or putting stress on the animals.

下列各句中，没有语病的一句是