问题补充:
It was in the lab was in the charge of Professor Smith they carried out the experiment.
A. where;that
B. which;where
C. that;where
D. which;that
答案:
A. where;that
B. which;where
C. that;where
(答案→)D. which;that
解析:本题考查强调句型及定语从句的连接词。第一空为定语从句,the lab是先行词,其在定语从句中作主语,故用which;第二空是强调句型中的that。
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