When ______ help, one always says “Thank you” or “It’s very kind of you”
#90750
A
offering
B
offered
C
to offer
D
offer
推荐题目
With difficult problems ___, the president feels relaxed now. 
#96323
A
settled
B
settling
C
to settle
D
being settled
I have no one ______ me, for I am a new comer here.
#98185
A
help
B
helping
C
to help
D
to have helped