1 . Just ________ a baby kangaroo must learn to protect itself when it leaves its mother’s pocket, I will have to learn to protect myself when I grow up. (用适当的词填空)

2 . The car was driving ________ (smooth) on the highway. (所给词的适当形式填空)

3 . Our parents are more ________ about our health and future. As far as I’m ________, we should talk with our parents and tell them our ________. (concern) (所给词的适当形式填空)