来自彭建亮的问题
【Itisgood____theteacherto____theblackboardA.help;cleanB.tohelp;cleaningC.toheip;tocleanC.helping;toclean为什么这样选？】
Itisgood____theteacherto____theblackboard
A.help;cleanB.tohelp;cleaning
C.toheip;tocleanC.helping;toclean
为什么这样选？
3回答
2020-08-14 21:50