A.essential
B.great
C.necessary
D.dominant

A.You can take a taxi.
B.I’ll fly to Sydney.
C.It’s about thirty miles.
D.It’s only six hundred dollars.

A.Yes,I will.
B.That’s great.
C.I’m afraid I won’t be free.
D.Is it all right?

A.Come again when you are free
B.Oh,I don’t think Icooked very well.
C.It’s not necessary for you to say so.
D.I’m glad you enjoyed it.

A.An hour before
B.In half anhour.
C.Until the next one.
D.Before another one.

A.I’d rather not.
B.I’d be happy to.
C.I’d like it.
D.I’ve no time.

A.speaks
B.spoke
C.speaking
D.saying

A.involvement
B.installment
C.investment
D.instrument

A.urgency
B.crisis
C.immediacy
D.emergency

A.local
B.broad
C.general
D.public

A.Ho,I have no idea.
B.I’m glad you likeit.
C.Many happy returns of the day!
D.You must be very happy.