No matter how bright a talker you are, there are times when it's better ________ silent.
| A．remain | B．be remaining |
| C．having remained | D．to remain |
While reading, you can make a mark _____ you have a question.
| A．the place where | B．what | C．that | D．where |
In view of lacking preparations for the competition and not wanting to lose face,
Johnson eventually decided to _____.
| A．drop in | B．drop off | C．drop back | D．drop out |
Shylock, how can you hope for mercy yourself when you show _____.
| A．it | B．nothing | C．none | D．no one |
The doctor couldn’t answer the question _____ the patient could survive that night.
| A．if | B．that | C．whether | D．what |
---I got up at five this morning, I thought it was Friday.
---You _____ so early. It is Sunday today; you don’t have to go to work.
| A．mustn’t have got up | B．needn’t have got up |
| C．needn’t get up | D．mustn’t get up |