He was not really in the mood for anything ______ it dawned on him that it had not been his fault.
| A．since | B．when | C．after | D．until |
—Lisa, what do you think of the job of being a nurse?
—In my opinion, it ____ be difficult sometimes though it seems easy.
| A．should | B．can | C．must | D．need |
Tom makes ____a rule to give a summary of the new important points after class.
| A．that | B．what | C．them | D．it |
Into the dark apartment ___ , who was quite surprised when everyone shouted “Happy birthday!”
| A．did David walk | B．David did walk |
| C．David walked | D．walked David |
－I’ve decided to compete in the race, but I’m afraid I won’t be the best.
－____. You never know until you try.
| A．Enjoy yourself | B．Go for it |
| C．Do as you like | D．Take your time |
The dog ____attacked passers-by and therefore was kept on a chain by the owner.
| A．eventually | B．fortunately |
| C．frequently | D．similarly |