Students ________ remain in their seats until all the papers have been collected.

You       trust an online shop just because it has a beautifully-designed website.

____ I fill in the application form right now, sir? No, you needn’t. You can complete it this afternoon.

We can do a lot to stay healthy. __________, we should eat a balanced(平衡的) diet.

—Is Mary coming by plane?—He should ,but he _____not. He likes traveling by train.