It was my mother ____ bought me a computer last week.
A. which
B. what
C. who
D. whose
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It was because of his good performance at the interview ____ he got the job with the big company.
A. why
B. what
C. that
D. while
It was two months ago ____ a young scientist solved this problem.
A. when
B. which
C. what
D. that
It is she ____ is right.
A. who
B. which
C. what
D. how
____ is the small things that can cause serious problems for dormitory relations.
A. That
B. It
C. This
D. The
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