在乙肝病毒标记物中,传染性强的指标是
B
暂无解析
It is imperative that you ____ here in time.
______ hard work it is!
We acknowledged the receipt of your letter dated 26th September _____ connection ______ the above subject.
The foreigners _________there, but they _________the food there at first.
I ’d like to have a long holiday, but I’m really too busy to _____ the time.
We thank you for your letter of May 27 and the _____ illustrated catalogue.
How long have you____?
While I was waiting for her ,I killed time____looking in the show windows.
Talking to foreigners is fun if you____the right time and place.
There are many ___to do so for the participants.