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