PSAs are often run _____ free, and are ______ to educate people about health, safety, or any other problem that affects public welfare.
| A．for, mean | B．for, meant | C．of, to mean | D．in, meaning |
_____turn green in spring.
| A．Leaf | B．Leafs | C．Leave | D．Leaves |
On the wall _____ two large portraits.
| A．hangs | B．hang | C．hanged | D．hanging |
A good deal of money ____spent on books.
| A．have | B．has | C．have been | D．has been |
Miss Smith is a friend of ______.
| A．Mary‘s mother’s | B．Mary‘s mother |
| C．Mother’s of Mary | D．Mary mother‘s |
His “Selected Poems” _____first published in 1965.
| A．were | B．was | C．has been | D．are |