—Is the dentist at work?
—I'm sorry to tell you he is on __________.
| A．an enough holiday long |
| B．a long enough holiday |
| C．a holiday enough long |
| D．a long vacation enough |
The world’s population has grown _____ it was in 1800.
| A．six times more than what | B．more than six times what |
| C．six times more than which | D．more than six times that |
She rose with the face red, _______ at the rude waiter.
| A．watching | B．seeing | C．staring | D．glaring |
The workers in Australian Air Line had been on strike for two weeks. At last they had their pay _______.
| A．raised | B．raising | C．risen | D．rising |
The food is not much. How long do you think it will _______?
| A．hold on | B．hold back | C．hold out | D．hold together |
She hurried back to her house, only ________ a lot of her jewels ________.
| A．finding; robbed | B．finding; stolen | C．to find; robbed | D．to find; stolen |