CO2
fresh air
the tested compartment's air
water
第1题：
A. gym
B.study
C.outskirts
D.spotlight
答案：B
解析：句意为：布朗一家喜欢晚饭后在他们的（）看书。gym意为“健身房，体育馆”，study意为“书房”，outskirts意为“郊区”，spotlight意为“聚光灯”，根据句意此处选B。
第2题：
We can learn from the passage that______.
A. Reading is just a way of knowing new words
B. A good reader must learn more new words
C. A good reader can think before, while and after reading
D. Reading takes a lot of time
35．答案为C 通过短文得知好的阅读者懂得在读前、读中、读后思考。A、B与短文内容冲突，D选项未提到。
第3题：
A、be prohibiting
B、be prohibited
C、is prohibited
D、was prohibited
第4题：
What could result in an incorrect oxygen concentration reading on the oxygen indicator ________．
A.Exposure to carbon dioxide for no more than 1 minute
B.Exposure to carbon dioxide for more than 10 minutes
C.Exposure to a very low concentration of sulfur dioxide for no more than 2 minutes
D.None of the above
第5题：
While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then ______.
A.enter the tank safely
B.suspect the accuracy of the reading
C.ventilate the tank
D.test for nitrogen
第6题：
Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an ____.
A.Orsat apparatus
B.flame safety lamp
C.Halide torch
D.combustible gas indicator
第7题：
What is the best instrument for establishing a safe working area before welding in a confined space?
A.An oxygen indicator
B.A combustible gas indicator
C.A combination combustible gas and oxygen indicator
D.A flame safety lamp
第8题：
After reading your letter , I can thoroughly understand why you are running ()patience.
A、without
B、out of
C、lack of
D、in
第9题：
If the meter needle of the oxygen indicator cannot be set to zero，what should be done ________．
A.Replace the batteries
B.Check the sampling tube for blockage
C.Adjust the final reading by the amount the needle is displaced from zero
D.Replace the platinum filament
第10题：
After each reading of an oxygen indicator, the instrument should be purged with ______.
A.CO2
B.fresh air
C.the tested compartment’s air
D.Water