第一部分 单项填空（共15小题； 每小题1分，满分15分）
21. ---I'm afraid you have the wrong number.
---Sorry! _______.
A. It's only a coincidence B. I have put my foot in my mouth
C. I was stuck. D. I hope I didn't bother you
22. ____his great love for the works of J. K. Rowling, he has a broad range of interest in other English writers as well.
A. In addition B. As a consequence of C. Except for D. Apart from
23. By the time he _____ back last night, we had got 200 pictures of the Chang'e-3 lunar probe.
A. came B. had come C. was coming D. would come
