--- Hey, what’s up? Water is everywhere. What can I do for you?
--- Oh, great. I ______ how to operate this damn new machine.
| A．just wondered | B．was just wondering |
| C．had just wondered | D．have just wondered |
Mom，don’t you think it's OK to play once in a while ____________ it doesn’t affect my studies?
| A．even if | B．unless | C．so that | D．as long as |
— Is everyone here?
— Not yet．Look，there ______________ the rest of our guests!
| A．come | B．comes | C．is coming | D．are coming |
The boy was so tired that he fell asleep _____________ his mother could take off his clothes．
| A．before | B．after | C．while | D．where |
—Why not find a new job?
—Why should I? I _____________ as much，but I like what I'm doing．
| A．didn't earn | B．don't earn | C．hadn't earned | D．haven’t earned |
Advertising can influence consumers' moods，_____ in turn，can influence consumers’reactions to products．
| A．that | B．which | C．where | D．when |