He is such ______! He is sure to ruin（毁坏）all the fun here if you invite him to the party.
| A．a wet blanket | B．a black sheep |
| C．a white elephant | D．a green finger |
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 |
The question under discussion here is ______ of the "white pollution".
| A．that | B．which | C．one | D．it |