Mary is ill hospital. [ ]
A. in
B. in the
C. /
D. the
答案：A
Here are some toys. You can _______ one for your little son as a birthday gift.
A．rule out
B．pick out
C．take out
D．carry out
肛瘘形成的主要原因是（）
A.肛裂
B.内痔
C.外痔
D.直肠肛管周围脓肿
E.直肠脱垂
