Ⅰ.用括号内所给单词的适当形式填空
1．Perhaps economy is the solution (solve) to your financial troubles.
2．I don't like the way you used my bicycle without my permission (permit)．
3．The arrival ceremony for guests at the White House is simple but impressive (impress)．
4．You'll risk lower grades in other subjects because you didn't use your limited (limit) time to study them.
5．An astronaut exploring an unknown planet could do at least part of his exploration (explore) without leaving his spacecraft.
6．The 10,000metrelong highway was constructed (construction) in 1996.
7．She is an easygoing girl，but sometimes she can be moody (mood)．
8．There were many clothes and food provided (provide) for the homeless by the local government.
9．What's your parents' reaction (react) to your recent bad behaviour?
