【题目】We should save paper. Please remember to print on________sides of the paper.

【题目】Be careful when you cross the road. It’s known to us that ________comes first.

【题目】She usually________to school because her home is next to the school.

【题目】John promises to help his mum with housework________he is free today.

【题目】I enjoy leaning English so much and I_______ speak it very well.

【题目】—Did you find the small house yesterday?

【题目】The water in the river_________ clean and clear. It's safe to drink it.

【题目】You have to be________until I complete my work.

【题目】We offered Jack a helping hand. However, he________it. He thought he could manage it alone.

【题目】Nobody________TV. Let’s turn it off.