第二部分 语言知识运用 （45分）
Ⅱ. 单项选择(15分)
根据句子的意思，从所给的A、B、C三个选项中选择一个能够填入空白处的最佳选项。
( ) 17. ----The city looks beautiful.
----Yes, A lot of trees and grass _________ last year.
A. are planted B. were planted C. have planted
( ) 18. He found it hard _________ his class.
A. to catch up with B. to catch up C. catch up with
