Tom took the police to the spot ____________ the accident happened.
| A．which | B．that | C．where | D．When |
Scientists generally agree that Earth’s climate will warm up over the next 50 to 100 years _________ it has warmed in the 20 000 years since Ice Age.
| A．as long as | B．as much as | C．as soon as | D．as well as |
--Mary 1ooks down today.What is up？
---Well，_________happened between Mary and me is none of your business．
| A．wherever | B．whoever | C．whatever | D．no matter what |
To help myself get to sleep, I have tried several ways but it seems that _______works.
| A．nothing | B．none | C．neither | D．all |
______ Beijing you see today is quite ______ different city from what it used to be.
| A．The; / | B．/; the | C．The; a | D．A; a |
_______ you call me to say you are not coming, I’ll see you at the theatre.
| A．Until | B．If | C．As | D．Unless |