People have planted a great many trees in order to ____wind and sand in the desert.
| A．hold down | B．hold up | C．hold back | D．hold out |
35．Later，I realized that I didn’t know his name or the least bit about him，________intend to ask．
| A．nor did I | B．I did not | C．nor I did | D．either did I |
34. ---You have given us a wonderful Chinese dinner, Mrs. Wang.
---_________________.
| A．Oh, I’m afraid I didn’t cook very well | B．I’m glad you enjoyed it |
| C．Come again when you are free | D．It’s not necessary for you to say so |
33. He got well-prepared for the job interview, for he couldn’t risk the good opportunity______.
| A．to lose | B．losing | C．to be lost | D．being lost |
32．_____from lightweight materials，the robots are about the size of a human arm or
smaller．
| A．To build | B．Being built | C．Having built | D．Built |
31．The fact that smoking is harmful to health is____most smokers are quite aware of．
| A．what | B．which | C．where | D．That |