His friends go to Beidaihe by train _______vacation every year.
#48849
A
at
B
of
C
on
D
in
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He’s got a birthday cake____ his ____ birthday.
#48046
A
on ,thirteen
B
for ,thirteen
C
on ,thirteenth
D
in ,thirteen
It is selfless ________ the doctor to devote all the time he had ________ for the patients.
#46486
A
for; to care
B
of; to care
C
for; to caring
D
of; to caring