A successful scientist needs _____ if he wants to make hypothesis (假设) of how processes work and how events take place.
| A．permission | B．penetration |
| C．imagination | D．convention |
Now that the forest was destroyed by a big fire, a large ________of trees ______ to be planted on the mountain．
| A．number; has | B．quantity; has | C．amount; have | D．sum; have |
—The contest is so easy, but you fail to pass it．
—I’m sorry it ______ be this way．
| A．need | B．should | C．may | D．would |
They have most carefully the time and money needed to complete the project．
| A．picked out | B．left out | C．figured out | D．taken out |
Broadly speaking, I would agree with Shirley, though not ________．
| A．entirely | B．widely | C．extremely | D．eventually |
The two old sisters, so long, held each other and burst into tears．
| A．being separated | B．having been separated |
| C．having separated | D．had been separated |