1.I can’t (集中) on my work when I’m tired.
答案concentrate
2.Now that you are a college student,you should learn to be (独立的).
答案independent
3.It is a (不利因素) not to be able to drive a car.
答案disadvantage
4.The (平均的) age of the students in my son’s class is 12.
答案average
5.My dress is too long and I must (截短) it.
答案shorten
6.We were trained to speak fluently and without unnecessary (犹豫).
答案hesitations
