How long do you often spend _______ this book , boys? 
#49038
A
reads
B
to be read
C
to reading
D
reading
推荐题目
Good weather, isn't it? Let's___a walk through the park.
#49572
A
take
B
takes
C
taking
D
to take
I want ___ a policeman because it is an exciting ____.
#51250
A
to be , job
B
doing , work
C
to do , job
D
be , work
Could you please not ____________ here? 
#50841
A
smoking
B
smoke
C
to smoke
D
smoked