It was essential that the application forms ___________ back before the deadline .
| A．must be sent | B．would be sent |
| C．be sent | D．were sent |
__ unemployment and crime are high, it can be assumed that the latter is due to the former.
| A．Before | B．Where | C．Unless | D．Until |
______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
| A．Although | B．As long as | C．If only | D．As soon as |
The medicine works more effectively you drink some hot water after taking it.
| A．as | B．until | C．although | D．if |
Owen wouldn’t eat anything ____________ he cooked it himself
| A．until | B．since | C．unless | D．while |
My parents don’t mind what job I do I am happy.
| A．even though | B．as soon as | C．as long as | D．as though |