1. ---Do you know the girl with brown hair over there?
---Oh, that’s Betty. She is a friend of _______.
A. we B. our C. us D. ours
2. We were very sad and angry to hear that the bad milk pow der ______the deaths of over 30 babies
A. made B. put C. caused D. gave
3. _______ he is only 8 years old, he knows more about science than his father.
A. But B. Though C. So D. Because
4. ---We must stop the hunters hunting the Tibetan antelopes(藏羚羊) in Tibet.
---I agree with you. If we ________, they will disappear soon.
A. won’t B. aren’t C. don’t D. mustn’t
