My dog is gentle and never bites. So you needn’t be       .

Eric arrived on time, ______ it was the rush hour.

— Judy, I guess you are only twenty-five years old, is that true? — Oh, it’s a ______.

The students are from England and __________ maths teacher is from China.

 —_______ will your parents take you to Shanghai?— In about two months, after I finish the final exams.