— Did Jack come back early last night?
— Yes. It was not yet eight o’clock ________ he arrived home.
| A．before | B．when | C．that | D．until |
—Excuse me sir, where is the room 301?
—Just a minute. I’ll get Bob _______ you to your room.
| A．show | B．shown | C．to show | D．showing |
However, at times this balance in nature is disturbed, _______ a number of possibly unforeseen effects.
| A．resulting from | B．resulting in |
| C．having resulted from | D．having resulted in |
He just _______ the headlines because he was too busy to read the whole newspaper.
| A．stared at | B．looked around | C．glared at | D．glanced through |
The new technology has opened up a very wide _______ of possibilities.
| A．extent | B．number | C．collection | D．range |
_______ the new medicine for a year and we’ll see how well it works.
| A．Try out | B．Make out | C．Give out | D．Pick out |