:一、单项选择 （共20题 每小题1分）
1.We always keep spare paper, in case we run out.
A. too much
B.a number of C.plenty of D.a good many
2. It is the
in this country to go out and pick flowers on the first day of the
spring.
A.use B.custom
C.habit D.normal
3. I know he hasn’t finished his
homework, but ,
he has done his best.
A.at all
B.in all
C.after all
D.above all
