He _______ another career but, at the time, he didn’t have enough money to attend school.
| A．might choose | B．might have chosen |
| C．had to choose | D．must have chosen |
___ the temperature falling rapidly, we couldn’t go on with the experiment.
| A．Since | B．For | C．As | D．With |
—How much is the rent of the house, Mrs. Sandra?
—One hundred dollars, the electricity and telephone fee ____.
| A．contained | B．included | C．containing | D．Including |
How ________ they learn anything when they spend all their spare time watching television?
| A．must | B．should | C．may | D．Can |
— The man is always behaving rudely.
— That I guess is ________ people avoid him.
| A．because | B．how | C．why | D．Whether |
— Do you want to come with us?
— No, thank you. I’d rather ____.
| A．not to | B．not | C．not doing | D．not to come |