The most important thing________we should pay attention to is the first thing________I have said.
A. which；that
B. that;which
C. which;which
D. that;that
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Mount Wuyi is such an attractive place of interest________everyone likes to visit.
A. that
B. as
C. which
D. what
The boy________is cleaning the blackboard now is Tom’s best friend.
A. that
B. whom
C. whose
D. he
The man makes full use of the time________he can spare.
A. with which
B. when
C. it
D. that
手术时间的早与晚可以选择，又不致影响治疗效 果，有充分时间做准备称为（）
A. 择期手术
B. 限期手术
C. 紧急手术
D. 无菌手术
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