It isn’t quite ______ whether the teacher will collect the homework by Friday, so you needn’t hurry.[ ]

Wait till you are more ________. It’s better to be sure than sorry. [ ]

Many students in this school make __________ a rule to come to the evening classes even on Saturdays and Sundays

In this seaside resort, you can _____ all the comfort and convenience of modern tourism.

Jack tries his best to learn how to make a vase, in order to their promise to finish an artwork with her.