腹痛常见病因有哪些？
参考答案：
外感时邪，内传于里；饮食不节，肠胃受伤；情志失调，气滞血瘀；阳气素虚，脏腑失煦。
用am , is填空，注意大小写.
① This _____ my book.
② _____ that her eraser?
③ It _____ a pen.
④ Her name _____ Jenny.
⑤ What _____ this in English?
⑥ I _____ Mary. Nice to meet you.
