I believe _____ important to have a rest when you feel very tired.

When the school building began to shake,the teachers ran downstairs _____ all the students. The teachers are real heroes. [ ]

How much does the ticket ______ from Shanghai to Beijing?

You can study grammar _____memorizing it. [ ]

You can’t stand working with Jane in the same office, can you? —______,because she just refuses _______while working．