Even if there is no scientific proof secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk.

inks the naughty students have escaped beingpunished by their teacher, __________

Linda，make sure the tables ________ before the guests arrive

Occasions are quite rare _____ I have the time to spend a day with my kids [ ]

h, you’ve got a good job Do youreally work here—No, Susan I ______ out until themanager comes back