The box was too heavy for me to carry, 　　　 I pulled it into my room. 

--What are you going to buy? --Some _________. Tomorrow is Halloween.

You have finished writing an e-mail on computer , but too many mistakes in it . You can chick _____ .

 —______ do you surf the Internet?—About twice a week.

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