Cars do cause us some health problems, in fact, far more serious ________ than mobile phones do.
| A．one | B．ones | C．it | D．those |
You’ll sound a lot more polite if you make a request _______ a question.
| A．in the form of | B．in reply to | C．in preparation for | D．in return for |
Seeing the happy ______ of boys playing on the playground, I can’t help thinking of my childhood.
| A．sign | B．act | C．scene | D．view |
Chinese football fans often _______ late to watch live matches of the World Cup.
| A．stay up | B．mix up | C．turn up | D．put up |
---Do you know what makes her so _______?
---Too many useless text messages she has received.
| A．normal | B．annoyed | C．enjoyable | D．selfish |
Every time _______ I come across difficulties, I will turn to my parents for help.
| A．/ | B．when | C．that | D．which |