If you really want yourself to be in good health, you must ___ always ___ so much.
| A．not; be smoking | B．not; have smoked |
| C．not; to smoke | D．be not; smoking |
I raised the alarm _______ I saw the smoke.
| A．while | B．the minute |
| C．suddenly | D．since |
The doorkeeper gave the alarm _______ he saw the smoke.
| A．while | B．the instant |
| C．suddenly | D．before |
“Did you remember to give Mary the money you owed her?” “Yes, I gave it to her ________ I saw her.”
| A．while | B．the moment |
| C．suddenly | D．until |
“When did he leave the classroom?” “He left _______ you turned back to write on the blackboard.”
| A．the time | B．the moment |
| C．until | D．since |
“Will he agree to come to join us in the work?” “No, _______ we promise him more money.”
| A．when | B．unless |
| C．unless | D．as soon as |