It’s difficult for the village children to cross the river for school.— I think a bridge _______ over the river.

Whose shirt is this?—It ______ be Li Lei’s. It is too big for him.

If you are weak ____ a subject, ______your teacher for advice can help.

. _______ the road round to the right and you’ll find his house.

What are you doing now?—I _______ computer games with my sister.