10 years ago， _________ only one classroom building in our school. And in 10 years， _________ five classroom buildings in our school.

Have you bought ____________ for Linda’s birthday?—- Not exactly. Just some flowers.

David usually takes _______ walk for an hour after dinner.

Though the passage is easy, I don’t think __________can understand it.

The pet dog is warm and loving, It ______ as a daughter of my family.