They are very happy bacause they think _____ apples is a fun ____

问题描述:

They are very happy bacause they think _____ apples is a fun ____
第一个空:A pick B picks C piking D are piking
第二个空:A work B job C works D jobs

第一个选C 因为是动名词 第二个选B因为是单数,且work不能表示名词的工作.