--Can I play computer now?  --No, you ______. You _____do your homework first.

When he was there, he ______ go to that coffee shop at the corner after work every day.

You had better ________some food and drinks before the field trip ________.

 My English-Chinese dictionary isn’t in my schoolbag. Where _________ I have put it?

The factory ______ its waste into the river, but now it deals with the waste in a new way.