_____entering the classroom, remember to take your seat and turn off your cell phone.
| A．At | B．From | C．Upon | D．As |
—You oughtn’t to put drinks near ______ computer.
| A．the; a | B．the; / | C．a; / | D．a; a |
—______ in the snow for one hour.
| A．Being kept waiting | B．Keeping waiting |
| C．Because of waiting | D．She was kept waiting |
| A．will | B．can | C．must | D．\ |
| A．gave out | B．gave away | C．gave up | D．gave off |
| A．enterprise | B．ambition | C．aspiration | D．Admiration |