He was about to tell me the secret___________someone called him by his name.
| A．as | B．until | C．while | D．when |
--- We need someone to host the New Year Party.
--- ________ the handsome young man have a go?
| A．Need | B．Must | C．Shall | D．Will |
Being a teacher always encouraging students to think for themselves, I won't tell them answers until they __________ on a math problem for more than an hour.
| A．have worked | B．will have worked |
| C．will have been working | D．had worked |
He could speak English fluently because he __________ it for four years when he was a college student.
| A．had studied | B．have been studying | C．studied | D．was studying |
Looking at my mother's ___________ face, I regretted not having told her my whereabouts on the phone.
| A．worrying | B．worried | C．anxioused | D．satisfied |
--This decision really upsets me.
--- _______, Ellen. Things will work out well.
| A．Don't mention it | B．I don't think so. |
| C．No problem | D．Take it easy. |