问题

When ______ help, one often says “Thank you.” or“It’s kind of you.”
A:offering
B:to offer
C:to be offered
D:offered
B:to offer
C:to be offered
D:offered
正确答案是:
同类题型
This morning, he arrived out of _______because he gotup ________.
You can nevertouch this machine when it ________, it is very dangerous.
Is your job a cook, Alen —Yes, _______.
are you getting on with your work— Oh, I’m sorry. Things aren’t going sowell as ____.
The text is _______easier and _______interesting thanthat one.