单项选择题
A.light B.bright C.tight D.dark
Where can the lights be fitted? （）A. For two hours.B. A...
单项选择题Where can the lights be fitted? （）
A. For two hours. B. At once. C. In the holds. D. Tomorrow.
You should （）a close watch on the hatches.A.lookB.giveC...
单项选择题You should （）a close watch on the hatches.
A.look B.give C.keep D.see
You （）use hooks when discharging bagged cargo.A.shouldB...
单项选择题You （）use hooks when discharging bagged cargo.
A.should B.shouldn’t C.must D.can
