Reciting does much good in language learning and it _____helps to learn science subjects better.
| A．on the contrary | B．in turn | C．by chance | D．in return |
Some plants can take in carbon dioxide we breathe out and give ______ oxygen to us.
| A．in case | B．in turn | C．in return | D．in addition |
— If you like I can do some shopping for you.
— That’s very kind of you for your ______.
| A．service | B．offer | C．point | D．suggestion |
It’s no longer a question now ______ man can land on the moon.
| A．that | B．which | C．whether | D．what |
It’s said that there are plenty of hotels in that town. There ______ be any difficulty for you to find somewhere to stay.
| A．wouldn’t | B．mustn’t | C．shouldn’t | D．needn’t |
Yesterday I was walking downstairs when I missed my foot and had a bad fall, nothing serious, ______.
| A．even | B．either | C．then | D．though |