1 These are the motives for doing it.
A reasons B excuses
C answers D replies
2 The river widens considerably as it begins to turn west
A extends B stretches
C broadens D bends
3 Many economists have given in to the fatal lure of mathematics．
A error B puzzle
C attraction D contradiction
4 With immense relief I stopped running
A no B 1ittle
C scarce D enormous
5 A great deal has been done to remedy the situation
A maintain B improve
C preserve D protect