The sons and daughters said they never fully appreciated their parents _________ it was too late to tell them.
| A．as | B．that |
| C．until | D．When |
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 |
I hate _______ when someone calls or knocks at the door while I’m still in bed.
| A．it | B．that | C．them | D．those |
The hike costs ￡2,500 ____all fights and accommodation.
| A．including | B．include | C．included | D．to include |