____ is known to everybody, the moon travels round the earth once every month.
| A．It |
| B．As |
| C．That |
| D．What |
Only when you stay withlocal people for a period of time will you havebetter understanding of life here.
| A．a; 不填 | B．the; a | C．不填; the | D．the; the |
The purpose of her talking to me last night actually _______this: That I shall never trust him any more in future.
| A．comes round | B．comes out | C．comes on | D．comes to |
The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as of a great number of services.
| A．the one | B．that | C．ones | D．those |
I ______ tell you with certainty that he won’t be able to finish it before the deadline.
| A．will | B．must | C．can | D．may |
His humorous closing speech was a welcome addition to the ______dull meeting．
| A．therefore | B．meanwhile | C．otherwise | D．nevertheless |