问题补充:
—Who has taken my pen away?
—. He was here a moment ago.
A. It must be Li Ping
B. It is Li Ping take
C. Li Ping is
D. Li Ping must take
答案:
A. It must be Li Ping
B. It is Li Ping take
C. Li Ping is
D. Li Ping must take
解析:
本题是对情态动词的考查。句意表示肯定的推测用must,而it指问句中提到的who。