Depression is the leading cause of suicide, __ __ in turn is the third leading cause of death among 15 to 24 year olds in the United States．
| A．who | B．which | C．that | D．what |
-- Would you please pass me the book, Jack?
---_______. Here you are.
| A．It’m my pleasure | B．That’s right | C．With pleasure | D．Never mind |
With the development of technoledge, ____ mobile phones have more functions, rather than _____ means of communication.
| A．/; a | B．/; the | C．the; / | D．a; / |
I often think of the days ______ I took part in the military training with the soldiers, _____ has a great effect on my studies.
| A．which; that | B．that; which | C．when; who | D．when; which |
Actresses look young_______their ages, for they pay much attention to their looks.
| A．at | B．of | C．for | D．to |
You’d better not call me up between 7 and 8 this evening, for I ____ an important meeting then.
| A．will have | B．am having | C．will be having | D．will have had |