You should try to get a good night’s sleep _______ much work you have to do.

Wang Mei is one of many Chinese teenagers _____ “on the go”

These countries will join one another against terrorism,      was agreed to at the international conference.

I really don’t know　　next step.

—Will Mr Brown come to visit the company ?—We don’t know if he _______．If he ______，we’ll tell you．