Mr. Wu___this math problem____him many times, but he still doesn’t understand it.
#38768
A
explains ; to
B
has explained ; for
C
has explained ; to
D
explained ; with
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The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film.
#38260
A
is explained
B
will be explained
C
explains
D
has explained
--Does he _______a tennis ball? --No, he __________.
#38089
A
has; isn’t
B
has; doesn’t
C
have; isn’t
D
have; doesn’t
---Oh, Mrs. King, your dress looks nice. Is it new? ---No, I ______it since two years ago.
#42589
A
had
B
bought
C
have had
D
have bought
—Oh, Mrs. Liu, your necklace looks nice. Is it new? — No, I ____ it for two years.
#39277
A
had
B
have had
C
bought
D
have bought