When______help, one often says “Thank you”. or “It’s kind of you”.
#90755
A
offering
B
to offer
C
to be offered
D
offered
推荐题目
One of the most important social problems of today is _____ jobs to the  unemployed.
#98020
A
what to be given
B
having given
C
how to give
D
to have given
________hard before, Tom is afraid of failing in the exam. 
#97409
A
Having been worked
B
Not to have worked
C
Having never worked
D
Never have worked