The young teacher _______ gave us a lessonyesterday comes from Beijing.

I think it takes a lot of practice to play the violin well.— . Practice makes perfect.

_________________ and you will succeed in time, I dare say.

My father told me that he had＿＿＿ hard life in his childhood.

The national parks are very important forthe protection of these wild animals, which would ______ run the risk ofbecoming extinct.