The teacher will get angry with you if keep on()()(做鬼脸)in class

问题描述:

The teacher will get angry with you if keep on()()(做鬼脸)in class

答案是making faces
making a face和making faces都是可以的,但是由于只有两个空,所以只能填making faces.face是可数名词,所在在使用时,前面要么加冠词,要么把face变为复数.
另外keep on后面接动词,必须是ing形式.make必须变为making.