—Tony, you must have noticed the student who broke the window. —I’m sorry. I _______ attentively. 
#99787
A
studied
B
was studying
C
am studying
D
would study
推荐题目
The person we spoke to ____ no answer at first.
#104466
A
making
B
makes
C
make
D
made
The Tibetans          in the Himalayas for centuries and have adjusted to the conditions at________.
#102472
A
has live; a such great height
B
have live; such a great height
C
has lived; a such great height
D
have lived; such a great height
They _____ on the program for almost one week before I joined them, and now, we ____on it as no good results have come out so far.
#100667
A
had been working; are still working
B
had worked; were still working
C
have been working; have worked
D
have worked; are still working