男,29岁。上腹饥饿疼和夜间疼3年,每年冬季发作,3d前黑便并出现休克。
诊断应考虑:().
A.胃溃疡
B.十二指肠溃疡
C.胃癌
D.胃炎
E.十二指肠憩室
参考答案:B
在四边形ABCD中,如果∠A+∠B+∠C=280°,那么∠D=( )。
--- Didn’t your brother ________ go to school by bike?
--- Yes, he did. But he ________ walking to school now.
A.used to; used to
B.use to; used to
C.used to; is used to
D.use to; is used to