The students are doing some cleaning. Some are sweeping the floor, ________ are cleaning the desks and chairs.
| A．other | B．the other | C．another | D．others |
| A．article | B．build | C．bite | D．inside |
| A．exercise | B．elephant | C．engineer | D．excited |
| A．snake | B．take | C．lazy | D．practice |
– If you have any trouble, be sure to call me.
-_______.
| A．I am glad to hear that | B．I will. Thank you very much. |
| C．I have no trouble. | D．I will think it over |
- Why are you standing, Annie?
-I can't see the blackboard clearly. Two tall boys are sitting_______ me.
| A．behind | B．next to |
| C．in front of | D．in the front of |