1. Drinking water-------excessive amounts of fluorides causes the enamel of teeth to become brittle and to chip off, leaving a stained or mottled effect. (A) containing (B) in which containing (C) contains (D) that is contained 4. Great pain and swelling characterize both sprains and fractures, but------- the affected part and unnatural ting often indicate a bone break. inability lo move (A) inability to move (B) they were unable to move (C) unable to move (D) when inability to move
1(A),你的题目有误,causes谓语 4(A),he变为the,indicate谓语 |