Only then ______ how much damage had been caused.
| A．had she realized | B．she realized | C．did she realize | D．she had realized |
17. _______ here in time, he came _______ all the way.
| A．Getting; running | B．To be getting; to run | C．To get; running | D．To get; to run |
16. After he left college, he was employed in an international company and _______ there ever since.
| A．worked | B．has worked | C．had worked | D．was working |
15. The factory _______ large numbers of tractors to the peasants.
| A．provides | B．supplies | C．ensures | D．stores |
14. The teacher insisted _______ until we finished the work.
| A．we not rest | B．on our resting | C．we rested | D．we would not rest |
13. — How do you keep fit?
— By having a healthy diet and _________ regularly.
| A．turning out | B．working out | C．giving out | D．going out |