Criticism and self-criticism is necessary _____ it helps us to correct our mistakes.
| A．by that | B．at that | C．on that | D．in that |
Such a magazine has______except when you have time to kill.
| A．little value | B．much value |
| C．a lot of values | D．great value |
We must take measures to protect endangered wildlife ______it is too late.
| A．now that | B．as long as | C．unless | D．before |
People living in the area where there is a lack of electricity often keep a supply of candles_______power failure.
| A．in case of | B．once | C．even if | D．in course of |
_______ all his followers dead，the captain was taken by his enemy.
| A．For | B．As | C．Because of | D．With |
_Your suit won’t be ready_______Friday.You can collect it next Monday.
| A．on | B．by | C．till | D．for |