Look! These red shorts are _____ sale _____ only $8.[ ]

We’ll go for a picnic if it __ tomorrow. —That’s a good idea. But the radio says it’ll be rainy. Let’s make it later. [ ]

He has read many books on history, so it’s _________ for him to answer these questions.

We should respect teachers because they ________ us with knowledge.

There is a bridge _____ the river in front of my house. Let’s go _____ it. [ ]