____ several times, the young scientist still kept on doing his experiments.
| A．Having failed | B．Having been failed | C．Failed | D．To fail |
My parents don’t of my traveling outside alone during the summer holidays.
| A．submit | B．reject | C．approve | D．suspect |
—Shall we make an appointment at 10:00 tomorrow morning?
— . Maybe we can make it some other time.
| A．I’d like to | B．No, I shall be busy then |
| C．Don’t mention it | D．See you then |
Only after Mary read her composition the second time the spelling mistake.
| A．did she notice | B．she noticed |
| C．does she notice | D．she has noticed |
--I’m taking my driving test tomorrow.
--________________.
| A．Cheers | B．Good luck |
| C．Come on | D．Congratulations |
At last the boss_____to the workers' demand and offered better pay and working conditions.
| A．gave away | B．gave in |
| C．gave up | D．gave off |