I thought _______ very useful to know the customs of foreign countries.

 — What do you like to do _______ class?— I like to play volleyball.

— Is the price of the backpack very______?— No, it ______me only twenty yuan.

The first day of school, my teacher says “I” _______ a word in English. 

She can’t help you today because she has her hands full. She has to go shopping, pick up her son and then cook dinner.