第二部分：英语知识运用（共两节, 满分45分）
第一节：单项填空（共15小题，每小题1分，满分15分）
从每题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21．Faced with a problem, you have to it first, and then try to find a solution.
A．resemble B．substitute C．concentrate D．analyze
22．With trees and grass 39.6% of the urban area, the city of Weifang has taken on a new look.
A．covered B．covering C．to be covered D．being covered
