内痔早期的典型症状是（）
A.痔块脱出
B.无痛性、间歇性便后出血
C.疼痛伴血便
D.肛门常有黏液分泌物
E.肛门瘙痒感
参考答案：B
Could you please _____ me to play computer games tonight? [ ]
A. allow
B. to allow
C. will allow
D. allowing
