第一节 单项填空（共15小题，每小题1分，满分15分）
从a、b、c、d四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
1.if china’s space technology has achieved ____ breakthrough in this field, it really is ____ amazing wonder.
a.the; an b.a; an c.不填; the d.a; 不填
2.he didn’t regret saying what he did but felt that he ____ it differently.
a.could express b.would express c.could have expressed d.must have expressed
3.____ that you are chosen to be a volunteer at the london olympic games, what will you do?
a.assumed b.assuming c.to assume d.to be assumed
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