You _______ wash your hands before meals. It is good for your health.

The Friendship Store ___ is being rebuilt stands ____ the two main roads meet.

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

My brother is always making good use of the time _______ he can spare.

The couple _________ last week, which surprised their friends and relatives greatly because they appeared that happy all the time.