Such a fierce dog __ that we had to wait outsidebefore we could get into his yard

In order to continue to learn by ourselves when we have left school, we must ______ learn how to study in the school now.

Do you often speak English, Linlin—No, I ______ English in public. What should I do

下列对第一课的内容理解不正确的一项是 (　　)

Here ____ the professor and writer as well as his friends.