一 选择

1. – Isn’t the girl who talked to you kindly your sister?

–            . She is my English teacher.

  A. Yes, she isn’t       B. No, she is    

C. No, she isn’t        D. Yes, she is

2. When and where to go for the holiday __________ yet.

   A. are not decided            B. have not been decided

   C. is not being decided        D. has not been decided

3. Now day breaks, ________ the birds are singing.

A. because      B. for       C. since        D. as

4. Pandas will __________ if we continue destroying ecosystem(生态系统).

   A. die of    B. die away         C. die from      D. die out