第一节:语法和词汇知识(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。
例: We ______ last night, but we went to the concert instead.
A. must have studied B.
might study
C. should have studied D.
would study
答案是C。
21. Unfortunately, when I dropped
in, Doctor Li _____ for Beijing
to join in the fight against SARS, so we had not enough time for a talk.
A. just left
B.
has just left
C. is just leaving D.
was just leaving