![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
大卫把每幅图片都研究了两遍,又仔细地阅读了图片说明。
A.
David studied each photo and read the captions .
B.
David studied each photo twice and read the captions carefully.
C.
David study each photo twice and read the captions .
D.
David study each photo twice and read the captions carefully.