相关推荐：
【英语模拟题】
7. ______ it didn’t raise the debt ceiling and the US suddenly didn’t have access to the money it needed to pay its bill?
A. How if B. How come C. What if D. What for
8. These results confirm that the health benefits of fruits and vegetables are deeply ______ the minds of consumers.
A. rooted in B. familiar to
C. dependent on D. concerned with
9. The students will put off the outing until next week, ______ they won’t be so busy.
A. when B. as C. since D. while
