The engineer _____ my father is talking has just come from abroad.
A. with whom
B. with who
C. with which
D. that
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Is there anything _____ I can do for you?
A. which
B. who
C. as
D. that
This is the reason _____ they are all against the plan.
A. which
B. that
C. why
D. what
When and why he came here ________ yet.
A. is not known
B. are not known
C. has not known
D. have not known
________ is no reason for dismissing her.
A. Because she was a few minutes late
B. Owing to a few minutes late
C. The fact that she was a few minutes late
D. Being a few minutes late
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