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
I on the computer when Frank called me last night.( )
A.workB.will work
C.was workingD.am working
If you take this train, you in Shanghai in five hours.( )
A.arriveB.will arrive
C.arrivedD.have arrived
Zhaozhou Bridge is one of stone bridges in the world.( )
A.oldB.olderC.oldestD.the oldest
﹣ do you visit your grandparents,Tom?
﹣Twice a month.( )
A.How muchB.How oftenC.How longD.How soon
﹣ you give me a hand? I can't move the box by myself.
﹣No problem.( )
A.CouldB.ShouldC.MustD.Need