The old scientist devoted all her time she had ____ the western parts of China.

Timmy goes to school __________ every day. It’s 5 minutes’ walk from his home to school.[ ]

Oh, there is someone knocking at the door. — __________ must be your neighbour, Mrs Black.

Are you going to Shanghai?— Yes, we Shanghai next Sunday.

There is ______ “u” and ______ “s” in the word “bus”.