Those who _________ singing may join us.

The poster says that a writer and poet ___ to give us a talk on English next week.

We think that _______ more vegetables _______ good for us.

Every student as well as teachers who ______ to visit the museum ______ asked to be at the school gate on time.

– What a terrible collision accident! – Judging from the scene, personally, it is one or two car drivers, rather than the truck driver, who _____.