高三英语强化训练——被动语态

2007-10-31 14:50:57   来源:转载   评论:0 点击:
19) Pluto, the outermost planet of the solar system, ____photographically in March 1930.
A) discovered    B) was discovered
C) by discovery    D) when discovered
20) To get a better view of the stage, ____.
A) our seats had to be changed    B) our seats were changed
C) we had to change our seats    D) our seats were changed by us
22) After synthetic____, engineers had a better choice of material.
A) created    B) has created
C) has been created    D) had been created
23) I think much attention ____your pronunciation.
A) must be paid to    B) ought to be paid to
C) must pay to    D) should be paid to
24) Since 1970, millions of enthusiasts ____Vitamin C, which they believe can remedy the common cold.
A) have taken    B) have been taken
C) have been taking    D) have been taking
25) I don't remember ____the chance to try this method.
A) having been given    B) to have been given
C) having given    D) to have given
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