问题

Not only ,but I learned some knowledge.

A:did I helpother people
B:do I helpedother people
C:I helpedother people
D:helping otherpeople

正确答案是：

同类题型

I will never understand how it thatyou were an hour late on such a short journey

romised to call me last night— I called, but I just couldn’t _______

The meeting _________ by the time I gotthere yesterday.

Don’t wait for others to be polite. Show them __________ a friendly person you are.

The baby elephant is from Africa．She________．