Tom kept quiet about the accident ______ lose his job.
| A．so not as to | B．so as not to | C．so as to not | D．not so as to |
The traffic on the main streets has a longer green signal than ________ on the small ones.
| A．one | B．this |
| C．that | D．it |
What would have happened ________，as far as up to the river bank.
| A．Bob had walked farther |
| B．if Bob should walk farther |
| C．had Bob walked farther |
| D．if Bob walked farther |
You can't imagine that a well－behaved gentleman ________ be so rude to a lady.
| A．might | B．need | C．should | D．would |
It is hard for me to imagine what I would be doing today if I ________ in love，at the age of seven，with the Melinda Cox Library in my hometown.
| A．wouldn't have fallen | B．had not fallen |
| C．should fall | D．were to fall |
—Is John coming by train.
—He should，but he ________ not.He likes driving his car.
| A．must | B．can | C．need | D．may |