If we don’t protect the Earth, more and more wild animals will die out.A. appear quicklyB. disappear completelyC. stay healthy
-He looks very worried. -I wonder ______________________.
-Two of my classmates cheated in the English exam. -______________________ They should learn a lesson from it.
-You still got _________ in the face of big challenges. How brave you are! -Every time I want to stop, my parents and teachers always encourage me _______ on.
The news says that __________ middle school students in China choose to __________ every year.
-Are you free after lunch? -Yes. I have _____________ to do.