Bob _________ exercises. He’s ______unhealthy boy.

The boy ______ in the exam is a student in Class Nine.

There are many trees on side of the street, and of the trees is still growing.

Bob, you do well in English. Can you help me with it— Sure, but it’s ___________ for you to find your own learning ways.

The field research will take Luffy and Steven about two weeks; it will be a long time _______ we _______ again.