During the scientific experiment, Mr. Chen carefully poured the water into the tube, with my classmates _______ beside to see what would happen.
| A．were standing | B．stood | C．standing | D．to stand |
Sometimes I’m dying ______ him about it.
| A．tell | B．to tell | C．telling | D．of telling |
Wherever such an area is located, it will be immediately ______ by the enemy if armed forces are lacking.
| A．taken | B．caught | C．occupied | D．kept |
His hard work paid______ when he got the result.
| A．back | B．over | C．off | D．for |
While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth.
| A．now and then | B．over and over | C．up and down | D．here and there |
In order to ______ his muscle, Mike goes to the gym regularly to do exercise.
| A．sharpen | B．brighten | C．strengthen | D．deepen |