题目内容

See the flag on the top of the building? That was ___ we did this morning.

A. when
B. which
C. where
D. what

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The reason _ we haven't seen her these days is _ she has been on business abroad.

A. why; because
B. why; that
C. for; because
D. for; that

不能行胃癌根治术的是：

A. 子宫直肠窝转移
B. 肝十二指肠韧带内淋巴结转移
C. 脾门部淋巴转移
D. 癌组织浸润胰尾部时
E. 癌组织浸润横结肠时

The question is ___ we can reduce the cost of the products.

A. what
B. if
C. which
D. whether

医院中过高的人群密度可能会导致更多人感染病菌。（）

A. 对
B. 错