I’m so ______ to all those volunteers because they helped my terrible day end happily.
A. special B. superior C. grateful D. attractive
A ship in harbor is safe, but that’s not ______ ships are built for.
A. what B. whom C. why D. when
Just as I got to the school gate, I realised I ______ my bank in the cafe.
A. have left B. had left
C. would leave D. was leaving
______ scientists have learned a lot about the universe, there is much we still don't know.
A. Once B. Since C. Though D. Unless
If you come to visit China, you will ______ a culture of amazing depth and variety.
A. develop B. create
C. substitute D. experience
— Can you come to a party on Saturday, Peter?
— Oh, ______I'm already going out, I'm afraid.
A. what a pity! B. don't ask!
C. how come? D. so what?
