进食油腻食物后右上腹剧痛，辗转不安常见于（）
A.胃穿孔
B.胆石症
C.急性胃炎
D.急性胰腺炎
E.肝脓肿
参考答案：B
______ this your family ? --Yes,. it is
A．Is
B．Are
C．Am
D．Be
—What's Tom doing?
—He is ______ his keys. [ ]
A. looking at
B. looking for
C. waiting for
D. working for
