Life is always full of challenges. It seems that _____ one problem is solved, a new one will appear. It’s a good choice to face and overcome them bravely.
A. when B. because C. until
_______youuseyourdictionaryoften,yourspellingwillimprove.
| A．Whether | B．If |
| C．Though | D．While |
—It'shottoday.Whynotgoforaswim?
—________.Let'sgo.
| A．Goodidea | B．That'sright |
| C．Notatall | D．Welldone |
Theofficephonesaredirtyandthey_______nextweek
| A．willclean | B．willbecleaned |
| C．arecleaning | D．arecleaned |
I'mnothungrybecauseIhave_______hadlunch.
| A．ever | B．never |
| C．just | D．still |
You____touchanelectricfire.It'sdangerous.
| A．need | B．must |
| C．needn't | D．mustn't |