Someone is ringing the doorbell. Let’s see_______.

So much homework and so many after-school activities really make the students feel _______. That’s why we should lighten the burden(减负) on students.

He transplanted the young tree to the park ____it was the best time for it

Have you seen _______i-phone 5s, Jack—Is it a black one I think I saw ____ somewhere.

offered her the job, but I don’t know______ she’ll accept it.