Who is that girl?
I think _____ is Betty's friend. ( )
A.heB.himC.herD.she
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
The path was covered with snow,so we walked very _______.We were afraid of falling.( )
A.quicklyB.carefullyC.excitedlyD.hurriedly
China's high﹣speed railways _____ from 9,000 to 29,000 kilometres in the past few years.( )
A.are growingB.were growing
C.will growD.have grown
___________ can you write in English?
About forty words per minute.( )
A.How farB.How oftenC.How fastD.How long