China has _____ the host for the 2008 Olympic Games since July 13, 2001.
A. become
B. been
C. turned
D. became
E. becoming
F. being
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在Word中插入的“引用”类型不包括()
A. 脚注和尾注
B. 题注
C. 页眉和页脚
D. 索引和目录
I think of my father when I complain _____ trifles.
A. about
B. to
C. on
D. in
E. through
F. at
在DWDM系统发送端的OTM网元中,OTU板的out口一般会连接()。
A. OM板
B. OLA板
C. OD板
D. OTU板
I wondered whether dinner ready.
A. was
B. would be
C. had been
D. will be