There/ be/two/ boys/class/ tall/work/ monitor/. 

Câu hỏi: There/ be/two/ boys/class/ tall/work/ monitor/. 

A There are two boys in my class the tallest of whom works as the monitor.

B  There are two boys in my class, the taller of whom works as the monitor.

C There are two boys in my class, the tallest of them works as the monitor.

D There are two boys in my class, the taller of them works as the monitor.