问题补充:
Don’t worry about the kids. I think they can do it .
A. by yourselves
B. by myself
C. by themselves
D. by himself
答案:
A. by yourselves
B. by myself
(答案→)C. by themselves
D. by himself
解析:I think they can do it .宾语从句的主语是they,和它一致的反身代词是themselves。句意:不要担心孩子们。我想他们能靠他们自己做这件事。所以选C。