单项选择题

The old man has two daughters, _______are doctors.

A．both of them
B．both of whom
C．both who
D．they both
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单项选择题
Why are you so late I _________for you all the time.
A．have been waiting
B．am waiting
C．have waited
D．will wait
单项选择题
Which of the following is NOT included in permission of entering the school
A．Between 15 and 18 years old.
B．Passing maths and science exams.
C．Finishing first-year courses at college.
D．Students being in their final years at school.
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