It isn't quite __________ whether the teacher will collect the homework by Friday, so you needn't hurry.
| A．sure |
| B．right |
| C．certain |
| D．exact |
_____________ hard you try，it is difficult to lose weight without cutting down the amount you eat.
| A．Whichever | B．Whatever | C．However | D．Whoever |
It may not be a great suggestion. But before ______ is put forward, we’ll make do with it.
| A．a good one | B．a better one |
| C．the best one | D．a best one |
We should place emphasis on development and security, and develop nuclear energy on the base of security.
| A．equal | B．central |
| C．superior | D．maximum |
In _________eyes of children, playing on the Internet can only bring them________great fun.
| A．the；a | B．不填；a |
| C．the；不填 | D．不填；不填 |
— Everything for the project has been progressing smoothly so far.
--- ____ that you’ll complete it on time.
| A．No wonder | B．No doubt |
| C．No need | D．No worry |