Please show me your library card before___any books

ÉT O ÉT , HÉP ME
1. please show me your library card before___any books
    a lending                 b.borrowing           c.selling                            d.asking
2. when___waste paper,we can use save much money and labor
    a.co-operating         b.destroying          c.recycling                        d.creating
3. which of those milkmaid is the___
    a. pretty                   b. most pretty        c.the prettiest                   d.prettiest
4. how long have you known him___
    a.since five years    b.for five years       c.ever since five years    d.along five years
5. if you___late,you would konw what we are talking about now
    a.were not               b.have not been     c.had not been               d.are not

GHI RÕ TẠI SAO CHỌN ĐÁP ÁN NHÉ ,THANKS