题目内容：

14.Mrs.Brown is supposed ____ for Italy last week.[A] to have left
[B] to be leaving[C] to leave[D] to have been left
15.A new technique ____,the yields as a whole increased by 20 per cent
A] working out[B] having worked out[C] having been worked out[D] to have been worked out
题 16
16.The boy's father bought him a large toy train ____.[A] to play with[B] to play with it[C] which to play with[D] at which to play

优质解答

14 B to be leaving
15 C having been worked out
16 A to play with
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