The website is very popular. And it’s amazing that __________ designer of it is just __________ nine-year-old child.
| A．the; the | B．a; the | C．the; a | D．a; a |
He never thought that his success came ________ he least wanted it.
| A．until | B．since |
| C．when | D．while |
Some experts have said that ________ children believe they can succeed, they will never become totally confident of themselves.
| A．if | B．since |
| C．once | D．unless |
Our society insists on regular habits, timekeeping and punctuality, and whether we like it or not, ________ we mean to make our way in society, we have to comply (to act in accordance with a demand, rule, etc.) its demands.
| A．whether | B．after |
| C．if | D．until |
________ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
| A．Even if | B．As far as |
| C．If only | D．So long as |
It is comforting to see that ________， we are doing our part for the environment.
| A．as small may be we | B．as we may be small |
| C．small as may be we | D．small as we may be |