---What’s the world’s ______ national park?--- It’s Yellowstone National Park in the US.
Mr. Li often tells some jokes to make us_______.
It’s easy _____ a banana milk shake. Let me help you.
Anna is very busy these days, She has _____time to play with me.
---How many birds can you see in the trees? ---I can see ___birds in them.
---____will he come back from Kunming? ---In a week.