The child complained that the old man made no answer when           where he lived.
#96853
A
asking
B
being asked
C
having asked
D
asked
推荐题目
__________ to sun, rain and wind for a long time, the stone split.
#94107
A
Being exposed
B
Having exposed
C
Exposed
D
To expose
 Carbon dioxide(CO2)_______ from burning fuels is the most common of the so-called greenhouse gases.
#91467
A
producing
B
having been produced
C
to be produced
D
produced