What do you think of the Chinese language today? —- Quite popularIt __________ an important role in communicating with other countriesMore and more foreign friends are learning Chinese

The police wondered_____.

My parents will move back into town in a year or________[ ]

I can’t stand _____ with Jane in the same office. Shejust refuses ____ talking while she works.

Leaves are found on all kinds of trees, but they differ greatly ______ size and shape.