The professor could hardly find sufficient grounds______ his arguments in favour of the new theory.
A. onwhich base
B. which to base on
C. to base on
D. to be based on
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Govenment reports, examination compositions, legal documents and most business letters are main situations_______ formal language is used.
A. in which
B. at which
C. on which
D. in that
The course normally attacts 20 students per year, ______ up to half will be from overseas.
A. in which
B. for whom
C. with which
D. of whom
The material is elastic, _________ is shown in the future.
A. which
B. as
C. that
D. just as
We had to eat standing up because we hadn’tanything ________ we could sit on, and the grass was too wet.
A. which
B. where
C. what
D. that