EXCEPT
(A)Dan, Ellen, Susan
(B) Ellen, Robert, Tommy
(C)Ellen, Susan, William
(D)Ellen, Tommy, Wiliam
(E)Kate, Robert, Susan
17. If each of the Henderson children rides in a different canoe, which of the following must be true?
Ⅰ.The Penick children do not rode together.
Ⅱ.The Penick parents do not ride together.
Ⅲ. The Henderson parents do not ride together.
(A)Ⅰonly
(B)Ⅱonly
(C)ⅠandⅡonly
(D)Ⅰand Ⅲ only
(E)Ⅰ,Ⅱ, and Ⅲ
18. On one of the days of the trip, while the canoeists go over rapids, Jerome chooses to go hiking with two of the children rather than canoeing, and there are six people in the canoes, two in each canoe. If the other conditions still hold for the canoeists, which of the following could be a list of the children in the canoes?
(A) Dan, Kate, Susan
(B) Dan, Kate, William
(C) Dan, Tommy, William
(D) Dan, William. Susan
(E) Susan, Tommy, William
Questions 19-22
M, N, O, P, Q, and R are perfectly straight one- way streets.
Each street in this group is parallel to two of the other streets in the group, with no intervening parallel streets other than streets in the group.
Each street in the group intersects three of the other streets in the group.
Traffic moves in opposite directions on alternate streets.
P and R intersect.
O and Q are parallel.
Traffic moves in the same direction on R and N.
Traffic moves south on M.
Traffic moves east on two of the streets.
19. Which of the following streets intersect?
(A) M and R
(B) N and M
(C) O and P
(D) Q and N
(E) Q and P
20. It must be true that traffic moves in
(A) opposite directions on M and R
(B) opposite directions on P and Q
(C) the same direction on O and P
(D) the same direction on O and Q
(E) the same direction on O and R
21. If traffic moves east on Q, which of the following must be true?
Ⅰ.Traffic on M can make a left turn onto Q.
Ⅱ. Traffic on R can make a left turn onto Q.
Ⅲ. Traffic moves east on O.
(A)Ⅰonly
(B)Ⅱonly
(C)Ⅰand Ⅱ only
(D)Ⅱand Ⅲ only
(E)Ⅰ,Ⅱ, and Ⅲ
22. If traffic moves west on P, which of the following must be true?
(A) Traffic can proceed on P across M and then make a right turn onto N without first leaving P.
(B) Traffic can proceed on R across P and then make a right turn onto Q without first leaving R.
(C) Traffic can proceed on R scores M and then make a right turn onto N without first leaving R.
(D) Traffic on R that reaches the intersection of R and O can make a left turn onto O without first leaving R.
(E) Traffic on P that reaches the intersection of P and R can make a right onto R without first leaving P.
23. The newly discovered moon of Jupiter has an orbit around the planet that is well within the Roche limit for Jupiter. The Roche limit is the distance within which satellites with a liquid core break up because of the strength of a planet's gravitational pull.
Which of the following conclusions can most properly be drawn from the information above?
(A) The newly discovered satellite bas begun to break up.
(B) The object called a newly discovered moon of Jupiter is not in fact a moon of Jupiter.
(C) The newly discovered moon of Jupiter does not have a liquid core.
(D) The Roche limit for Jupiter is farther away from the planet than is the Roche limit for other planets.
(E) Jupiter has a weak gravitational pull.
24. Choose the most logical completion for the following paragraph.
A pluralist society takes into account the claims of recognized groups, with their conflicting interests, and attempts to mediate between them. But no group that is not sufficiently well organized to be recognized can make its claims count for anything at all. Its advocates will be treated as extremists or foreign agents. Thus the net effect of government action taken along pluralist principles will be to __________.
(A) strike the best possible compromises
(B) suppress the freedom of speec