—What does Canada export？
—Large quantities of wheat ______ sent abroad．
A. is B．have C．are D．is being
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There ______ (be)a variety of toys on sale in that shop．
His leg was hurt. ______ is why he didn't come.
A. It B．Which C．That D．There
It ______ Wang Fang and Li Ming ______ cleaned the classroom.
A. is; that B．was; who C．are; who D．were; that
______ the English examination I would have gone to the concert last Sunday.
A. In spite of B．But for C．Because of D．As for
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