单项选择题
A.improve B.speed up C.reinforce D.enhance
The boat drill is finished. You are （）(解散).A.dismissedB...
单项选择题The boat drill is finished. You are （）(解散).
A.dismissed B.dismiss C.gone D.left
Water is used to put out （）(普通火).A. common fireB. elect...
单项选择题Water is used to put out （）(普通火).
A. common fire B. electric fire C. oil fire D. fire
At each drill a different person should be in （）(负责)of ...
单项选择题At each drill a different person should be in （）(负责)of an extinguisher.
A.charge B.load C.discharge D.handle
