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51. To handle the delicate situation, you must ；be____________.
A) more than careful
B) more carefully
C) carefully enough
D) enough carefully
52. The governess agreed to teach the temperamental child ____________ she was given complete authority.
A) whether
B) for
C) that
D) provided
53. According to the periodic table, ____________ still some elements undiscovered.
A) there seem to be
B) it seems to be
C) it seems that
D) here seem
54. The farmer used wood to build a house ____________ to store grain.
A) with
B) in which
C) which
D) where
55. A beam of light will not bend round the corners unless ____________ to do so with the help of a reflecting device.
A) being done
B) made
C) to be made
D) having made
56. ____________, the more severe the winters are.
A) The more north you go
B) The farther you go the north
C) The more you go north
D) The farther north you go
57. Vicky has been sad recently, for her plan to go to college ____________ at the last moment.
A) fell out
B) fell behind
C) fell through
D) fell off
58. You had better ____________ teasing these newcomers, for that will hurt their feeling.
A) leave out
B) leave for
C) leave off
D) leave behind
59. Don't lose heart! You should _____________ your courage and overcome the difficulty.
A) hold up
B) set up
C) pull up
D) pluck up
60. He ____________ a sum of money every month to help the two orphans.
A) sets aside
B) sets up
C) sets along
D) sets in
