You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
| A．in case | B．unless |
| C．though | D．as |
—It is a mystery and a shock to all who knew him that he____ have taken his own life in this way.
—What a pity, indeed.
| A．must | B．may |
| C．can | D．should |
_____, everyone present was amused by his adventure story in Africa.
| A．Absurd as might it sound |
| B．As it might sound absurd |
| C．As absurd it might sound |
| D．Absurd as it might sound |
_____ he is enthusiastic and qualified for the job, I see no reason to remove him from office.
| A．Provided that | B．Even though |
| C．Unless | D．As if |
It’s an art to be parents. With children, if you say “no”, you have to mean_____.
| A．that | B．this |
| C．it | D．one |
The first time I ____ Todd, he ____ to some students at the English corner.
| A．had seen; was talked | B．saw; talked |
| C．had seen; talked | D．saw; was talking |