Mr. Putin told CNN in an interview that the United States should not ________ in Russia’s internal affairs.

Scientists are convincedthepositive effect of laughter_____physical and mental health

Would you please________ your storybook________ me–Sure, But you must return it to me before Wednesday.

This morning we have __________ classes, and the __________ class is Chinese.

I hope you will study hard and master as much knowledge as possible; otherwise you will have to live a hard life_______.