–Is that Kate’s car?--It ______be hers. She has just gone for a meeting.A. can’t B. may C. mustn’t
--I hear this kind of CD-ROM is very popular. --Let’s buy one before it ____________.
This problem is ______ difficult __________.
_____ hard work it is! But _____ fun it is to finish walking the trail.
The life we were used to ________ greatly since 2002
Your shoes under the bed _________. Put them in the sun, please.