Not until he received the invitation ________to attend the summit held in New York.
| A．did he decide | B．he had decided | C．had he decided | D．he decided |
56. In the college entrance examination, one of my students did very well _____ poor handwriting.
| A．except | B．except for | C．except that | D．but for |
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 |