________hard you try, it is difficult to lose weight without cutting down the amount you eat.
| A．Whatever | B．However | C．Whichever | D．Whenever |
58. It is said that a collection of paintings by David is _____ exhibition at the Museum.
| A．on | B．at | C．for | D．In |
57. I am sure you will excuse me _____ not telling you ahead of time.
| A．from | B．for | C．since | D．At、 |
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 |