以下哪些为SIP请求消息（） A: A.INVITE B: B.100Trying C: C.ACK D: D.OPTION OPTIONS

The meaning of "bend over backward" is ( ). A: trying one's best B: trying to bend backward C: trying to kneel down

What is the speaker mainly trying to do in a job interview?? The speaker is trying to enlighten the audience.;|The speaker is trying to entertain the audience.;|The speaker is trying to persuade and convince the audience.|The speaker is trying to teach something to the audience.;

Our discussions helped both of us learn more about______. A: what were we trying to achieve B: what we were trying achieving C: we were trying to achieve D: what we were trying to achieve

他们正竭尽全力争取得到一切可能得到的帮助。 A: They are trying their best for getting all the assistance possible. B: They are trying their best for get all the possible assistance. C: They are trying their best to get all the assistance possible. D: They are trying their best to get all the possible assistance.

I only called the police when I ______ everything else. A: tried B: was trying C: had tried D: had been trying

We can conclude that Isabel Burton ______. A: had been trying to get her husband a job in a place where she could go with him B: had been trying to get her husband a job in Brazil C: was always trying to plant fruit trees from Brazil D: was always trying to make great efforts in Brazil

Isuggest_________oncemore. A: try B: to try C: trying

It is no good ______ remember only grammatical rules. You need to practise what you have learned. A: trying B: to try to C: try to D: trying to

______for a person who has more problems than you do. A: Not try to work B: Trying not to work C: Try not to work D: Not trying to work