---Wasn’t it Dr. Wang who spoke to you just now?---____.
A. I don’t know he was
B. Yes, it was
C. No, he wasn’t
D. Yes, he did
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Was ____ that I saw last night at the concert?
A. it you
B. not you
C. you
D. that yourself
It is these poisonous products ____ can cause the symptoms of the flu, such as headache and achingmuscles.
A. who
B. that
C. how
D. what
It was for this reason ____ her uncle moved out of New York and settled down in a small village.
A. which
B. why
C. that
D. because
It was ____ back home after the experiments.
A. not until midnight did he go
B. until midnight that he didn't go
C. not until midnight that he went
D. until midnight when he didn’tgo