Did you know the Earth is home to __________ animals?

The woman was ______ her son because he didn’t finish his homework. [ ]

Daddy, can you buy me a new MP4 when you go to Beijing?—You ______ get one if you are admitted to Fengxin No.1 Middle School.

The English teacher isn’t here. She ________ to the office.

Why are you late, Jim?—Because there _________ a lot of traffic when I came here.