20.A.recalling
B.starting
C.blocking
D.holding
答案:C 考查动词辨析。根据下文中的“stopping negative thoughts and refusing to dwell
on(沉湎于)negative images”可知,block意为“阻碍”,与句中的“stop”和“refuse”意思相近,符合语境。故选C项。recall意为“回想”;start意为“开始”;hold意为“持有”,均与语境不符。
.语法填空
(2017·海口市调测)
John:I've been noticing recently quite a lot of black smoke coming out of the chimneys of that factory near our school. __1__ really pollutes the air here.
Mary:Yes. But I heard recently that the __2__(own) of the factory have promised to take measures to reduce their factory's pollution.
John:I hope they will keep their promise.
Mary:I think they will. I've been told that
__3__ special machine is supposed to be fixed by the end of this year. It's said that the machine can clean the dust out of the smoke
__4__ it goes into the air.
John:That's good. Dust is really __5__(harm) to our lungs. I know that because my family lives near a steel factory with a chimney constantly __6__(pour) out black smoke.
Mary:Oh, you live near the steel factory? Is it true that we shouldn't eat the fish from the lake
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