Listen! I think it____ be Mr. White singing in the office.
No, it ___ be him. He left for London just now.( )
must; mustn't
may; mustn't
must; can't
can; can
The sentence pattern of "I enjoy living in Gansu." is________________. ( )
A.S+V+OB.S+V+PC.S+V+IO+DOD.S+V+DO+OC
Which of the following suffixes(后缀)means "without"?( )
A.﹣ableB.﹣fulC.﹣ousD.﹣less
﹣_______have you kept this book?
﹣For two months.( )
A.How soonB.How oldC.How longD.How often
I______sleep very well, but then I started doing yoga and it really helps.( )
A.didn't use toB.used to
C.was used toD.wasn't used to
﹣Don't keep the lights on when they're not in use!
﹣____( )
A.Not at all.B.Sorry, I won't.
C.No, thanks.D.I'm afraid so.