With all my attention _______ my homework, I didn’t even notice my father standing by me. 
#90970
A
to fix on
B
fixed on
C
fixing on
D
to be fixed on
推荐题目
The old couple have three daughters,_____ graduating from the same university. 
#91076
A
all of them
B
all of whom
C
neither of them
D
neither of whom
 ______ in prison for ten years, no one recognized him.
#91615
A
The man’s having put
B
The man being put
C
The man having been  
D
Having been