To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.

“Mike is often absent from class.” “Tell him he _____ answer for it if he goes on behaving like that.”

 I requested that you      the task on time.

---Hi, Lucy．Have you heard of any good news about Frank recently? ---Yeah．She ____ have done better．She has been admitted to one of the top-ten universities in the States．

Nathalie suggested the problem worth paying attention ______ at the meeting.