Do you _________ or serve in an organization or are you a member of some group?
| A．simplify | B．require | C．sign | D．volunteer |
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 |
There is no point advocating banning smoking in public ________ the law is introduced.
| A．when | B．unless |
| C．since | D．because |
You know it's love when all you want is that person to be happy, ________ you're not part of their happiness.
| A．even if | B．as if |
| C．if only | D．if ever |