从下面方框中选出与下列句子中划线部分意思相同或相近，并能替换划线部分的选项

A．hard B．more than C．return D．had fun

31．Though she is over fifty，she looks very young．　　

32．We had a good time at Mary's birthday party last night．　　

33．It rained heavily this morning in the west of Chengdu．　　

34．They will go back to school to visit their teachers next week．　　．