题目内容
Dr.Stephen has been ________ himself in researching the wild life in the recent five years.
A.employed
B.busied
C.devoted
D.concentrated
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
题目内容
Dr.Stephen has been ________ himself in researching the wild life in the recent five years.
A.employed
B.busied
C.devoted
D.concentrated
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||