11.These are the motives for doing it. 5 R. b' A2 m3 P1 t) hA reasons * Z' D& H3 X" `, {* y* y' ~4 QB excuses 6 d) G$ Q' c0 K4 f; b4 X. V6 UC answers# u$ _4 A% o* m" P1 h
D replies- |) c& \1 u" R/ Y; ` ^
12.The river widens considerably as it begins to turn west.9 E9 s' w9 |) m9 Z! o
A extends7 } d" I- S# |/ ]0 K' p# n
B stretches * O) q6 n* ]6 V( T& w( FC broadens 2 W x E! k. u. e& B# fD bends* l: F; p; b; b) A+ v
13.Many economists have given in to the fatal lure of mathematics. 7 {- O! ^% c5 f# j: Y% Q; xA error ( `& ]( C) v# ]5 c% Z. f SB puzzle ) d- _4 a8 i$ X: X/ e! K8 a1 Y8 MC attraction 9 |# R- y' Q! P( SD contradiction6 T, `" o9 R' @3 e
14.With immense relief I stopped running. - V$ _; N+ d6 T3 \6 U, J& hA no 6 n8 v5 S& c0 _8 R% ]B little 4 p8 d- u$ b mC scarce $ w3 E$ e$ h1 n7 M0 ]/ a5 Q. N2 uD enormous$ R$ _3 \# x8 O" p
15.A great deal has been done to remedy the situation.4 F2 O9 S! t' a4 T' W$ j
A maintain 8 X2 Q& u+ q5 R) pB improve! s2 g' J6 j4 P$ ^5 o5 L( [
C preserve; \1 u4 [$ B- }4 P: ^1 y
D protect# q9 ~) s; R; R1 X6 x q1 b
参考答案:11. A 12. C 13. C 14. D 15. B