---Why was Professor Johnson unhappy those days?

---Can’t you see it clearly?

--- The only reason was that the theory he insisted on ________ wrong．

-I wonder if Bob ________ in the new job.

-I have no idea．But ________ he has never taken a day off.

-How do you improve your spoken English?

-________ with the native speakers.

-Tom, go and have Jenny here．Let’s play cards for a while．

-She must have gone to bed, for the lights ________ when I passed her room just now．

—He's done a good job, though it could have been done much better.

—He's a child, ________.

-- I'm green at everything.

-- Don't worry. ________ you get older, you get more experience.

-You haven't said anything about my new dress. You don't like it, do you?

-Oh, I ________ that. Mmm, it certainly looks pretty on you.

--It was ________ of you to share your food with me.

--That's all right.