the sentence , so he asked the teacher to explain it again.
| A．Not having understood | B．As he didn’t understand |
| C．Having not understood | D．He didn’t understand |
Do you know whom this garden ?
| A．is belonged to | B．is belonging to | C．belongs to | D．belong to |
Some pre-school children go to a day care centre, they learn simple games and songs.
| A．then | B．there | C．while | D．where |
John is not here today .Who can him in the game?
| A．take the place | B．instead of | C．replace | D．in place of |
I bought a dress for only 10 dollars in a sale; it was a real .
| A．exchange | B．bargain | C．trade | D．business |
Several companies are each other a contract（合同）.
| A．competing against; for | B．competed; with | C．compete with | D．competing with; to |