2012年8月10日，国家发改委宣布将汽、柴油价格每吨分别提高390元和370元，此次油价上调也是发改委继今年以来的首次上调。这次油价调整可能带来的影响是

①其互补品销售量会减少             ②改用燃气出租车数量增加

③物流业的生产成本提高             ④导致国际油价大幅度上涨

A．①②③

B．①②④

C．①③④

D．②③④

用括号中所给动词的适当形式填空。

1. There’s no reason ________ (come) to school late today.

2. I ________ already ________ (finish) my homework, so I can play now.

3. Email English is a new kind of ________ (write)English in the modern world.

4. Many man-made satellites ________ (send) up into space so far.

5. It's my turn ________ (clean)the classroom.