23.It’s the second time that I _______ in Beijing. What great changes! It’s years since I ________ here last time.
A.went; had left B.had been; left
C.have been; left D.have; had left
22.________ material used for running tracks in school across China may be ________ danger to children’s health.
A./; a B.The; a C./; the D.The; /
第一节:单项填空(共15小题;每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
21.-Do you think it’s going to snow over the weekend?
-_________.
A.I don’t believe B.I don’t believe it
C.I believe not D.I believe not so