21.第一节 单项填空
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
21We can never expect bluer sky unless we create less polluted world.
A.a;a B.a;the
C.the;a D.the;the
答案:A
解析:sky意为“天空”,前有形容词修饰时与不定冠词连用,表示“一片……的天空”;world为可数名词,与不定冠词连用表示泛指。
22.His parents him to give up the plan for the outing this weekend because of the bad weather but he just wouldn’t listen.
A.manages to persuade B.tries to persuade
C.managed to persuade D.tried to persuade
答案:D
解析:由“but he just wouldn’t listen”可知,他父母并未说服他放弃计划,所以题干要表达的是“试图说服”;另外,题干描述的是发生在过去的事,所以应用一般过去时。
23.Many graduates have crowded into big cities jobs.
A.in search of B.in place of
C.in need of D.in case of
答案:A
