23.-Why didn’t you try your best to stop him doing so?
-I tried to, but ________ I could, the policemen turned up.
A.until B.when C.before D.after
22.In 1994, China began collecting income tax from citizens earning more than 800 yuan per month but only 1% people were earning more than ________.
A.that B.it C.those D.one
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。
21.The Chinese yuan rose to a new high________ the US dollar on Monday, China daily has reported.
A.with B.of C.for D.against