________ number of the student in Class 1 ________ forty-four．

A．The; is

B．A; are

C．A; is

D．The; are

You ________ go far if you need help with your homework．

A．don't need

B．don't have to

C．needn't to

D．don't have

It is a good habit of ________ to read a few lines before going to bed．

A．I

B．me

C．my

D．mine

Do you know ________ girl in green? She is our monitor．

A．a

B．an

C．the

D．不填

We've stayed there for ________．

A．two and half an hour

B．two and half hours

C．two hours and a half

D．two and a half hour