What do you think of your host family, Jim?—Great. They try ________ best to make me feel at home.

You’d better take a sun umbrella to protect yourself ____ the sun shine. [ ]

There was a heavy rainstorm yesterday. The flood ________ the bridge over the small river.

. — What’re you going to do to protect the environment? — Plant trees on side of the river.

I ________ thank you too much for all your help to my son while we were away from home.