一 When did the computer crash?
一 This morning, while I the reading materials downloaded from some websites.
| A．have sorted | B．was sorting | C．am sorting | D．had sorted |
It is difficult for us to learn a lesson in life_________we’ve actually had that lesson.
| A．until | B．after | C．since | D．when |
There were some chairs left over____ everyone had sat down.
| A．when | B．until | C．that | D．where |
The old man has a son and two daughters, ______treating him well, ____makes him sad.
| A．none of them; which | B．and none of whom; that |
| C．none of whom; which | D．and none of them; that |
—Will you tell the secret to the teacher?
—No!_________asked to.
| A．Even though | B．Until | C．Unless | D．When |
Women______-drink more than two cups of coffee a day have a greater chance of having heart disease than those _______- don’t.
| A．who; / | B．/; who | C．who; who | D．/; / |