1.It looks great and tastes good.
2.This issued is little noticed.
3.Group discussion should be encouraged in class.
look taste等词本身就带有被动意味 所以使用的时候不必变成被动语态~类似的词还有sound feel(摸)...等等...不记得还有什么了 以后想起来再告诉你吧~
多做点练习 对你提高英语成绩很有好处~加油哟~
祝你英语进步!