Not until he met with the difficulty _______ the importance of group work.
| A．he realized | B．did he realize | C．realized he | D．he didn’t realize |
32. ---I can’t see words on the blackboard clearly .
---Why, your eyes need _____ .Perhaps you need ______ glasses .
| A．to examine; wear | B．to examine; to wear |
| C．to be examined; to wear | D．examining ; wearing |
31. Attention must be paid to ______ science and technology..
| A．develop | B．developing | C．development | D．Developed |
30. When I first set _____ in Germany, I had no idea what the future may have ____ for me.
| A．feet; in store | B．my feet; in store | C．feet; in the store | D．foot; in store |
29. Heat capacity is the amount of energy it takes __________the temperature of a substance one degree centigrade.
| A．raising | B．rising | C．to raise | D．to rise |
28. This is the road ________ the mountain.
| A．lead to | B．leading to | C．led to | D．leads to |