Do you often____your pen pal-Yes, quite often. We often talk about our school lives in the letters.

When something ________ me, I can always go to my friends for help.

Researchers claim to have found the firstproof _______ getting a regular eight hours a night really does make you appearhealthier and more attractive

下列各句中，加点的成语使用正确的一项是(　　)

_______ dangerous the animals are！