问题

The young doctor is determined to devote all his life to ________ the cause of cancer.

A:studying
B:studied
C:study
D:studies

正确答案是：

同类题型

Your hat is nice.— _________.

—Can I borrow your car for a while?— Sorry, my car was damaged yesterday and it ______ now?[ ]

下列词语中的字形和加点字读音，全都正确的一组是（）

glish teacher often _____ usstories in class— Yes, he’s so popular

______ you can chat with yourfriends, makes communication easy