— The room is so dirty. _____ we clean it ?
— Of course.
| A．Will | B．Shall | C．Would | D．Do |
Without the air to hold some of the sun’s heat, the earth at night ____ for us to live.
| A．would be freezing cold | B．will be freezing coldly |
| C．would be frozen cold | D．can freeze coldly |
If only he _______ quietly as the doctor instructed, he would not suffer so much now.
| A．lies | B．lay |
| C．had lain | D．should lie |
He hesitated for a moment before kicking the ball, otherwise he ____ a goal.
| A．had scored | B．scored |
| C．would score | D．would have scored |
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 |
“Isn’t it about time you _____ to do morning exercises？” “Yes, it is. Would you like to join us？”
| A．begin | B．have begun |
| C．began | D．had begun |