-What does your father do?
-He is __________ art teacher.[ ]
A. a
B. an
C. the
D. /
答案:B
—How is the weather?
—It's _____. [ ]
A. raining
B. rain
C. rained
D. rains
结肠癌症状表现为
A.腹痛、腹泻,排便后腹痛缓解B.腹痛、腹泻,便中有脓血C.腹痛伴腹胀D.腹泻、发热伴里急后重E.大便习惯改变、便隐血阳性