肿瘤化疗引起的呕吐可选用
A．阿托品
B．昂丹司琼
C．构橼酸铋钾
D．乳果糖
E．西咪替丁
参考答案：B
I _____ late for school yesterday. [ ]
A. is
B. am
C. were
D. was
