51. I will______ the idea with the other teachers and see what they think about it.
A. explain
B. argue
C. discus
D. talk
52. You will become ill ______you stop working so hard.
A. until
B. when
C. unless
D. if
53. ’ll hand over all my files to my assistant before I______.
A. am leaving
B. leave
c. will leave
D. shall leave
54. ’m looking______ the summer holidays.
A. before
B. forward
c. for
D. forward to
55. When Mr. Brown’s daughter______ from university, he will be retired.
A. will be graduating
B. graduates
C. has graduated
D. will graduate