It _______ to me that we still have many things to do, so I went back to my office at once.
| A．happened | B．struck | C．occurred | D．broke out |
—Why are your eyes so red? You ________ have slept well last night.
—Yeah, I stayed up late writing a report.
| A．can't | B．mustn't |
| C．needn't | D．won't |
Some young people these days just ________ go out of their homes to contact the real world.
| A．mustn't | B．won't |
| C．mightn't | D．shouldn't |
Why ________ it get colder when we climb up a mountain? We are getting nearer to the sun!
| A．ought to | B．would |
| C．should | D．must |
I ________ to my cousin's birthday party last night, but I was not available.
| A．went | B．had gone |
| C．would go | D．would have gone |
If we ________ a table earlier, we wouldn't be standing here in a queue.
| A．have booked | B．booked |
| C．book | D．had booked |