单项选择题
In battery charging rooms，ventilation should be provided（）.
A.at the lowest point
B.near the batteries
C.at the highest point
D.only when charging is in progress
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If passengers are on board when an abandon ship drill is carried out，they should（）.
A.take part
B.watch
C.go to their quarters
D.stay out of the way and do what they want -
单项选择题
I would be very much（）if you could arrange for a radio technician to come on board as soon as possible for my radar repair.
A.obliged
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单项选择题
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