The cause of the death of the goldfish was most probably ()
A. lack of care
B. old age
C. the small fish tank
D. lack of water
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31()
A. attempt
B. answer
C. warning
D. sign
24()
A. out
B. up
C. over
D. on
She's upstairs ______ letters.
A. writes
B. is writing
C. write
D. writing
21()
A. yesterday
B. tomorrow
C. before the day
D. the day before