Our English teacher is ill, and we are all her health.
A. concerned about
B. careful of
C. grateful for
D. calm down
网友回答
(答案→)A. concerned about
B. careful of
C. grateful for
D. calm down
解析：考查固定词组。Be concerned about…关心…；be careful of当心…；小心；be grateful for对…感激；calm down镇定；句意：我们的英语老师病了，我们都很担心他的健康。故A正确。