1.foot n. 脚，足；英尺；底下，下面 vt．付账
get(set,start) off on the wrong foot 开始就把事情给做糟了，出师未捷
例句：I got Off on the wrong foot, and I don't have any idea which way to turn now.
stay off one's foot 脚不能用力
例句：I thought the doctor said you should stay off your foot until the swelling goes down.
2.mountain n. 山，山脉
make a mountain out of a molehill 小题大做；庸人自扰
例句：If you failed in the exam, it's nothing serious. Don't make a mountain out of a molehill.
3.now that 既然(since, now)
例句：1.Now that you are sick，you'd better stay in bed．
2.Now that you've got the rest, we'd better get down to business now.
A:Saturday my husband and I are going to visit his mother, how about you?
B:I'm going to fix some loose shutters on my house, now that the weather is a little warmer．