What did you do last night,Bob?
First I did my homework,and then I played ______ piano for half ______ hour.( )
A.the;aB./;anC.the;anD.a;the
Hello, Joe. I didn't _________ to see you today. I thought you were away on holiday.( )
A.wantB.prepareC.expectD.agree
Helen was very rude to me.I refuse to speak to her again __________ she says sorry.( )
A.untilB.ifC.becauseD.since
Every time Tom is late, he'll ___________ an excuse. So I wonder what his excuse is this time.( )
A.set upB.put upC.take upD.make up
The ____________that there is life on other planets has always encouraged scientists to explore the outer space.( )
A.invitationB.possibility
C.orderD.advice
I didn't see you at Jim's party last week.
I had to work that evening, so I _________ go.( )
A.needn'tB.mustn'tC.couldn'tD.shouldn't