Bill and Betty travelled a long distance __their vacation.
| A．on | B．in | C．at | D．about |
David had prepared carefully for the chemistry exam, as he wanted to be sure of passing it at the first _____.
| A．experiment | B．intention | C．aim | D．attempt |
---I saw Mr. Smith at Xianyang Airport this morning.
---You ____. He’s still on holiday in Hawaii.
| A．can’t | B．couldn’t have | C．mustn’t have | D．needn’t |
_____ much advice I gave her, she did what she wanted to do.
| A．However | B．Whatever | C．How | D．No matter |
---- How did you know the surprising news?
---- I happened ____ the event then.
| A．to cover | B．to be covering | C．covering | D．to have covered |
----How about the two of us chatting online?
---- ____ . It’s much cheaper than talking on the phone.
| A．No way | B．All right | C．Why not? | D．very well |