[A] on[B] in[C] among[D] along

A.store and review employee e-mail messages

B.store and review computer files

C.track telephone calls

D.log computer time and keystrokes entered

E.record and review telephone conversations

Passage Three

It's Christmas again. We live on a dirty street in a shabby house among people who aren't much good. You can't see how pitiful it is that our neighbors have to make happiness out of this filth (污秽) and dirt. My children must get out of this. But how？ The money that we've saved isn't nearly enough.

The McGaritys have money, but they are show-offs with it. The McGarity girl just yesterday stood out there in the street eating from a bag of cookies while a group of hungry children watched her. I saw those children looking at her and crying in their hearts, and when she couldn't eat any more, she threw the rest down the sewer (阴沟).

Miss Jackson who teaches at the Settlement House (教育中心) isn’t rich, but she knows things, she understands people. Her eyes look straight into yours when she talks with you. Everyboby else here looks away because they'rs ashamed of their lives. I'd like to see the children be like Miss Jackson when they grow up.

41. The writer suggests that her family______.

A. is extremely rich

B. is an unhappy one

C. live with nice and kind people

D. long for a change in their life

试证明：

(A∪B∪C)\(A∩B∩C)=(A△B)∪(B△C).

A.(AÍB)∧(B∈C) Þ A∈C

B.(A∈B)∧(B∈C) Þ A∈C

C.(A∈B)∧(B∈C) Þ A Ï C

D.(AÍB)∧(BÍC) Þ AÍC

A.a=b=c

B.a≠b≠c

C.a=b≠c

D.a≠b=c

A) on

B) with

C) to

D) by

A.A´B = B´A

B.(A´B)´C = A´(B´C)

C.A´(B∪C) = (A´B)∪(A´C)

D.如果A´C Í B´C，则A Í B