单项选择题
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
Every precaution must be taken to avoid （）.A.sparking b...
单项选择题Every precaution must be taken to avoid （）.
A.sparking being taking place B.to spark taking place C.sparking to be taken place D.sparking taking place
It is obvious that the expansion of the water （）the inc...
单项选择题It is obvious that the expansion of the water （）the increase of its temperature.
A.is due to B.dues to C.is because D.is for
