In China and some other countries, it is impolite to speak loudly _______ you are having a meal.
A. before B. while C. after
The little kid is just two years old. He's too young to take care of________.
A. his B. him C. himself
It is reported that a terrible rainstorm hit_____ south of our country last night.
A. the B. a C. an
The 20th Cup Opening Ceremony was held in Brazil _____ June 12th, 2014.
A. in B. at C. on
This math problem is so hard that I can't ______ .Please give me some advice.
A. look out it
B. work it out
C. give it out
Our teachers are very friendly to us. We _____ friends since three years ago.
A. have been B. have become C. would be
