两国模型中,在固定汇率制度下,经济波动的传导机制主要有收入机制和利率机制。( )
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______is often the case, we have workded out the production plan.
A. which
B. when
C. what
D. as
He was educated at a local high school,______he went on to Peking University.
A. afther which
B. after that
C. in which
D. in that
He has two children, and both of _____are abroad.
A. them
B. whom
C. which
D. who
could I speak to ____is in charge of international sales, please?
A. anyone
B. someone
C. whoever
D. no matter who
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