You can ’t get in. The exam  _____for over 30 minutes. 
#36950
A
has been on
B
has begun
C
began
D
begins
推荐题目
---What’s your sister doing now?--- She ______ her homework.
#39656
A
does
B
will do
C
is doing
D
was doing
I saw him in the library yesterday.  He ________ a book at that moment.
#38893
A
reads
B
is reading
C
was reading
D
will read
A young man ___ John _____ school recently.
#42489
A
calling; has left
B
called; will leave
C
calling; is leaving
D
called; has left