单项选择题
A.come from B.come in C.come out D.come up
We still do not know （）.A.where is the troubleB.where d...
单项选择题We still do not know （）.
A.where is the trouble B.where does the trouble C.where the trouble lies D.what is the trouble
A moving object will not accelerate or decelerate （）a f...
单项选择题A moving object will not accelerate or decelerate （）a force is applied to it.
A.whether B.if C.unless D.till
When was your ship built? （）is a new oneShe was deliver...
单项选择题When was your ship built? （）is a new oneShe was delivered to us by Bremen Shipyard only three months ago.
A.Ours B.Ours ship C.Our’s ship D.Our’s
