It isany wonder that his friend doesn’t like watching television much.
A. no
B. such
C. nearly
D. hardly
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It wasback home after the experiment.
A. not until midnight did he go
B. until midnight that he didn’t go
C. not until midnight that he went
D. until midnight when he didn’t go
Was it in 1969the American astronaut succeededlanding on the moon?
A. when; on
B. that; on
C. when; in
D. that; in
It is these poisonous productscan cause the symptoms of the flu, such as headache and aching muscles.
A. who
B. that
C. how
D. what
有关清扫的做法，正确的有：（）
A. 从地面到墙壁到天花板，对整个空间的所有角落进行彻底清扫。
B. 机器、设备、设施、工具的清洁，防止工具、手套等变成污染源影响质量。
C. 机器、设备底部及转动部位是卫生的死角，可以不用注意。
D. 细心寻找污染源及消除污染源，是清洁工作的关键所在。
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