The digital camera is very popular. But some still ____ too much.

Professor Lee failed many times but he ________found a good way to solve the problem

It’s a long time ______I saw you last.— And what is a pity now that it will be a long time______ we see each other again.

Where is Tom ?—Well , he you here Otherwise he would come down right now

I don’t feel _____ about it. How can I go to sleep?