Ifeltithardtokeepupwithmyclassmates.ButwhenIwantto

问题详情：

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

       A. go on                B. give up                     C. run away                  D. give back

【回答】

B

知识点：动词和动词短语

题型：选择题