问题
选择题
Every ________ had been made in order to save the boy with the H5N1 bird flu, but all in vain. He died at last.
A.effect
B.affect
C.infect
D.effort
答案
答案:D
词义辨析。A.影响 B. 情感 C.感染 D. 努力。句意:为了救助感染H5N1禽流感的男孩,付出了所有努力,但是都无济于事。他最后死了。故选D。