—Can we get everything ready by the weekend?
—It all depends on ______ we can get Mr. Green’s co-operation.
| A．that | B．what | C．whether | D．if |
We won’t keep winning games _______ we keep playing well.
| A．because | B．unless |
| C．when | D．while |
—What time do we have to be at the gate?
—_______ passengers start to board the plane.
| A．Hurriedly |
| B．Soon |
| C．Immediately |
| D．Since |
Simon thought his computer was broken _______ his little brother pointed out that he had forgotten to turn it on.
| A．until | B．since |
| C．after | D．because |
Don’t be afraid of asking for help _______ it is needed.
| A．unless |
| B．since |
| C．although |
| D．when |
Food shortage will long be a worldwide problem _______ much has been done to supply enough for everyone.
| A．before | B．if |
| C．since | D．although |