___________, he would have been fired.
| A．Had he lied to the boss | B．Did he lie to the boss |
| C．If he has lied to the boss | D．If he lies to the boss |
Have you seen a man ___ a school uniform come into the room?
| A．wearing | B．putting on | C．dressing | D．who dress |
It is necessary that a league meeting ___ this afternoon.
| A．hold | B．be held | C．will be held | D．is held |
How I wish I ___ your advice when you first warned me.
| A．took | B．should take | C．had taken | D．have take |
All this ___ that knowledge comes from practice.
| A．speaks | B．proves | C．explains for | D．teaches |
___, the car started.
| A．The signal giving | B．The signal is given | C．The signal given | D．Having given the signal |