Frank likes basketball very much and he wants to join(加入) the____.

e handwriting is an importantpart of our culture, so young people are required to ___ handwriting.

It’s cold outside. You’d better yourcoat.

Tom was a little weak in English. He had some difficulty in ______ the teacher in class.

The stone on the river bank rolled underher feet; she was _____into the river，and she called out for help