—_____ do you like science?
—Because it’s interesting.
| A．What | B．When | C．Which | D．Why |
— Could you tell me _____?
— Yes. He _____to Australia.
A.where is he;has gone B.where he is;has gone C.where he is;has been
We had to _____our discussion because one of us suddenly got ill.
A.take off B.turn off C.break off
— Would you mind my taking this seat? — ______.
A.Sorry, I can’t B.No,not at all C.It’s a pleasure
— ____can we board our plane? — In twenty minutes.
A.How soon B.How long C.How often
My e-mail______to you last night. Have you received it____?
A.sent;yet B.is sent;already C.was sent;yet