China is developing fast. That's ________ I think those of my colleagues who deal with China affairs should visit China.
| A．because | B．why |
| C．when | D．how |
— I’m thinking of the driving test tomorrow. I’m afraid I can’t pass it this time.
—I’m sure you will make it. _______!
| A．No wonder | B．Cheer up | C．No problem | D．No way |
All of __ sudden , I saw __ UFO with _____ alien in it flying in front of my house.
A. the ; the ; a B a ; the ; a C. a ; an ; an D. a ; a ; an
_________he is the son of the boss, he started from the lowest position as a common employee.
| A．Unless | B．Since | C．While | D．As |
Following the guide, we went into a house, _________ wall hung a picture of Einstein.
| A．on its | B．on that | C．on whose | D．on which |
Mr. Keller _________ forty cigarettes a day until he gave it up.
| A．had smoked | B．smokes | C．have smoked | D．smoked |