The number of foreign students attending Chinese universities ________ rising steadily since1990.
| A．is | B．are | C．has been | D．have been |
At our factory there are a few machines similar to ________ described in this magazine.
| A．them | B．these |
| C．those | D．ones |
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 |