—_______ should we clean the library?
—Twice a week.
| A．How many | B．How much | C．How long | D．How often |
I can’t understand you. Can you speak more_______?
| A．clear | B．clearly | C．quickly | D．easy |
It’s ____ to play on the road. You’d better play in a ____ place.
| A．safe, dangerous | B．safety, danger |
| C．safe, danger | D．dangerous, safe |
___of them has a dictionary and ___one of them can look up words in the dictionary
| A．Each,every | B．Every ,each | C．Each,each | D．Every,every |
My mom always tells me that _________/'nʌθɪŋ/ is difficult.
| A．nothing | B．nobody | C．none | D．something |
We play ________ basketball after class.
| A．a | B．an | C．the | D．/ |