Stressful environments lead to unhealthy behaviors such as poor eating habits, which _________ increase the risk of heart disease.
| A．by chance | B．in return | C．in turn | D．in a row |
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 |
I’m leaving for Hainan on holiday this afternoon. At this time tomorrow, I _____ on the beach.
| A．are going to walk | B．will be walking | C．will walk | D．are to walk |
David’s effort was ______, because he won the first prize in the English speech contest, which made his classmates surprised.
| A．paid off | B．paid back | C．paid for | D．paid up |