—Another cup of coffee? That’s your third since lunch.
—Yeah, well, I ______ all night preparing for my math exam. I can hardly keep my eyes open.
| A．stayed up | B．have stayed up |
| C．have been staying up | D．will stay up |
We were told not to touch the equipment in the laboratory unless ________.
| A．allowed to do | B．allowing to do |
| C．allowed to | D．allowing to |
------Where did you first meet your boyfriend?
------It was in the department store ______ he worked.
| A．which | B．that | C．what | D．where |
I think you should go back to your ______ plan, which is much more practical than the present one.
| A．original | B．random | C．abstract | D．ridiculous |
The job is not very profitable ________ cash, but I can get valuable experience from it.
| A．in case of | B．in terms of | C．in return for | D．in addition to |
On hearing the news, the girl rushed out without hesitation, ______ the luggage ______ on the floor, and ______ in the dark.
| A．left, lied, disappeared | B．leaving, lying, disappeared |
| C．leaving, lie, disappeared | D．left, lay, disappear |