He works hard and he's always ready when called upon to play.

小罗的训练很刻苦，当他被叫上场时，他总是已经准备好了。

youdao

John was not listening and made a random answer when called upon to reply.

约翰没有听讲，当被叫起回答问题时，他胡乱地给了个回答。

youdao

John was not listening and made a random answer when called upon to reply.

约翰没有听讲，当被叫起回答问题时，他胡乱地给了个回答。

youdao