第1个回答 2011-06-04
please tell us if you can't attend the meeting
第2个回答 2011-06-04
If you can't attend the meeting,please tell me in advance.
第3个回答 2011-06-04
Please let us know ahead of time if you can't attend the meeting
第4个回答 2012-08-06
Please let us know in advanceif you can't attend the meeting.