Engines are to machines _________ hearts are to animals.
| A．as | B．that | C．what | D．which |
19. This kind of desk can be ________ to the height you need, which makes it very popular.
| A．adopted | B．adjusted | C．referred | D．Designed |
18. Whenever we hear of a natural disaster, we feel sympathy ______ the people who have been affected.
| A．from | B．by | C．for | D．on |
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 |