The time he has devoted in the past ten years ________ the disabled is now considered ________ of great value.
#69205
A
to help;being  
B
to helping;to be
C
to help;to be
D
helping;being
推荐题目
Crusoe ___ a boat, but he failed.
#80509
A
meant to build
B
meant building
C
had meant to build
D
had meant building
The stones each ________ as much as two tons.
#68998
A
weighs
B
are weighed
C
weigh
D
is weighed