1.To confuse two things means not to be able to tell them __apart__.
2.Don't always count __on__ others for help, because you are old enough to do the work by yourself.
3.Effort leads to success and failure often lies __in__ laziness.
4.The two sides debated __with__ each other about who was the better for a whole day.
5.This restaurant wasn't half as __good__(well) as that other restaurant we went to.
6.__Instantly__(instant) it began to rain they took cover under a big tree.
7.It doesn't matter __whether__ you are Asian, American or European;we are all the same.
8.What she couldn't understand was __why/that__ fewer and fewer students showed interest in her lessons.