It is _______ it was yesterday

Who do you think will get the first prize—Mary, of course. She ________ for the competition formonths.

Stephen Hawking believes that earth is unlikely to be the only planet ______ life has developed gradually[ ]

Helen. You have come back from Dalian.Have you taken any photos—Yes, I’ll tomorrow.

lots of problems ________ in the class, our teacher looks very relaxed and happy.