问题补充:
—Who is the baby in this photo?
—It’s my sister’s son. The photo by her by e-mail ten days ago.
A. sends
B. is sent
C. sent
D. was sent
答案:
A. sends
B. is sent
C. sent
(答案→)D. was sent
解析:句意:照片中的婴儿是谁?——是我姐姐的儿子。这张照片是十天前她通过电子邮件送来的。结合语境可知本句描述的是过去的动作,故用一般过去时态。主语是动作对象,故用被动语态,选D。