All of the flowers now raised here have developed from those _____ in the forest.
| A．once they grew | B．they grew once | C．that once grew | D．once grew |
The countryside gives us peace and quiet, which is ___ we can’t enjoy living in the city.
| A．that | B．what | C．why | D．where |
.After graduation I was employed by a small private business and a small office was _______
for me.
| A．equipped | B．offered | C．shown | D．provided |
.Have you sent that letter off yet? There’s something important I’d like to add ______ it.
| A．up | B．to | C．/ | D．with |
Living in a house on a mountain top ______ be rather cold, especially in winter.
| A．can | B．shall | C．need | D．should |
_______ a reply from Mabel, Jack sent another e-mail to her.
| A．Not receiving | B．Having not received |
| C．Not received | D．Not having received |