Your teacher will be unhappy if you______to school late.
The number of the giant pandas in China is getting _________, but the red-crowned cranes are ___________.
Daniel found ___ easy to finish writing the report on wildlife.
If I ______ free tomorrow, we ________to Beijing Zoo.
They will build nature reserves _____ protecting ______ birds.
The sentence structure of “We call them mooncakes.” is _____.