—I doubt if he __________ to the party with us tonight.— I believe if he __________ his homework, he will go with us.
I heard Lucy ________ happily in her room when I passed her house.
---Excuse me, I want to buy some food. Where can I find a supermarket? ---I know ________ not far from here. You can easily find ________.
Learning country’s language is a better way of knowing ________ culture behind it.
—How is it going, John? —__________.
—It’s better to________more nature reserves to help save more animals in danger. —That’s a fantastic idea.