_______ is known to us all that the old scientist, for _______ life was hard in the past, still works hard in his eighties.
| A．It; whom | B．As; whose | C．As; whom | D．It; whose |
Parents should take seriously their children’s requests for sunglasses __________.
| A．because | B．though | C．unless | D．if |
—Shall we meet tonight?
—Sorry,I’m busy.How about_________day?
| A．every other | B．the other | C．any other | D．some other |
—I have learned that a large new building will be set up__________the Twin Towers once stood.
—So have I.But the American people haven’t yet got over the shock of September 11.
| A．where | B．when | C．which | D．that |
—Didn’t you buy a dress yesterday?
—No，__________I liked the colour，I didn’t like its style.
| A．since | B．if | C．when | D．though |
_________ I felt somewhat disappointed and was about to leave，something occurred which attracted my attention.
| A．Unless | B．Until | C．When | D．While |