Apple juice tastes___________.
.Although many great people ever failed, they never_______ and managed to succeed.
.Do you know ______ to deal with the problem? Could you tell me?
--- He hasn’t watched the movie “ So Young”, has he? --- ______. He told me it was very moving and interesting, he’d like to watch it again.
The world’s population is getting larger and larger, so scientists are trying to _______ new ways to solve the food problem.
Now more and more people ________ sending e-mails ________ letters.