I felt it hard to keep up with my classmates. But whenever I want to my teacher always

问题补充：

I felt it hard to keep up with my classmates. But whenever I want to , my teacher always encourages me to work harder.

A. go on

B. give up

C. run away

D. give back

答案：

A. go on

(答案→)B. give up

C. run away

D. give back

解析：考查短语辨析。句意“我感到很难跟上同学。但每当我想放弃时，我的老师总是鼓励我更加努力。”A“继续”；B“放弃”；C“逃跑”；D“归还”。故选B。