I regret ____you that we are unable to offer you employment.
#96754
A
informing
B
having informed
C
to inform
D
to have informed
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