问题
______have you been learning to swim —-Half a year.
A: Howlong
B: How often
C:How far
D: When
B: How often
C:How far
D: When
正确答案是：
同类题型
It’s important for us __________ more ways than knowledge itself.
My bad tooth ________ again and I will have it ________ out next week.
Carbon dioxide(CO2)_______ from burning fuels isthe most common of the so-called greenhouse gases.
What about ________ football after school—Good idea.
He was walking along the river __________ he saw a little boy lying under a tree.[ ]