H-20:hit the books 用功
A:Why not go dancing with us?
A:和我们一块去跳舞吧。
B:I'd love to, but I've got to hit the books.
B:我也很想去,可是我还得啃书本。
A:You can study tomorrow.
A:明天再学习吧。
B:No. We'll have a quiz tomorrow.
B:不行,我们明天有个小测验。