We recently did a simple experiment, which happens to ________ how children's knowledge of what a hero is like determines their behaviour.
| A．congratulate | B．acknowledge |
| C．distinguish | D．illustrate |
55. All the students envied him _____ having succeeded in the TOFEL test.
| A．as | B．for | C．in | D．With |
54. The football fans cheered their team _____ the entrance _____ the field.
| A．at; on | B．in; at | C．at; to | D．on; at |
53. Our music teacher often enjoyed _____ playing the violin in his spare time.
| A．him by | B．himself by | C．him in | D．himself with |
52. The struggle against sand storm will not end _____ victory unless we pay much attention to the balance of nature.
| A．at | B．in | C．for | D．With |
51. Don’t put your cell (手机) _____ the edge of the table, or it will fall off
| A．at | B．on | C．to | D．In |