It is only ___our power to carry out ( 执行) the rules, rather than make them.
A. within B. on C without D. off
---Mr. Smith, ______ he have all these letters typed for you right away?
---He ______. They should be ready by 10 o’clock this morning.
| A．will; must | B．shall; has to | C．need; will | D．would; ought to |
I won’t give you such help ______ you tell me the truth. It’s beyond my ability.
| A．when | B．since | C．if | D．even if |
---Mary has been trained hard for the last two years.
---______ she did so well at the track and field meet yesterday.
| A．No doubt | B．No question | C．No wonder | D．No problem |
When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
| A．that | B．it | C．this | D．what |
One of the best ways for people to keep fit is to ______ healthy eating habits.
| A．grow | B．develop | C．increase | D．raise |