It was only when the war broke out ______ he began to realize everything was too late.
| A．until | B．that | C．then | D．so |
Provide your doctor with a detailed medical history________he can give you accurate treatment.
| A．even if | B．in case |
| C．so that | D．as though |
While working outdoors，Linda was________by the heat and fell to the ground，unconscious.
| A．astonished | B．depressed |
| C．overcome | D．hit |
The man answered the phone in a loud voice at the meeting，________made Andy annoyed.
| A．that | B．what |
| C．who | D．which |
There is no simple answer，________is often the case in science.
| A．as | B．that |
| C．when | D．where |
Finding information in today’s world is easy.The ________is how you can tell if the information you get is useful or not.
| A．knowledge | B．ability |
| C．competition | D．challenge |