Tom and Jack like to speak ________ the phone. [ ]

After the new technique was introduced， the factory produced _______ tractors in

If you don’t work ______ enough, I don’t think your dream will come ______.

Do you know _______ the girl in red is?—I’m not sure. Maybe a doctor.

Zhang Lin has decided tohis bad habit of smoking．—That’s good news．I hope he can do it．