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tacking
46. Twenty dollars
A. is
B. are
47. A number of applicants
A. had
B. have
D. are being attacked
all I can afford to pay for that radio.
C. was
D. were
already been interviewed since last Monday
C. has
D. having
48. The number of residents who have been questioned on this matter
A. is
B. are
C. be
D. was
49. There
a rise in prices recently.
B. are
A. is
50. Several theories on this subject
B. has
A. was
TENSE
C, has been
C. have
in London.
D. have been
been proposed.
D. were
quite small.
D. has been living