______ abroad for more than two years, he returned to his hometown.
#89414
A
Studied
B
Studying
C
Having studied
D
To study
推荐题目
_____ his electronic dictionary made himself sad.   
#89974
A
Losing
B
Lost
C
Being lost
D
To be lost
_____ that there is no opposition , I will report it to the general manager .
#97769
A
To provide
B
Be provided
C
Having provided
D
Providing