“Don’t be late again , Tommy”  “OK,  _______.”

Our country the sixth population census(人口普查)            already.

 The scientists ________ on the new medicine for two years. They will succeed in no time. 

—Do you have any problems if you ______ five minutes to read?—Well, I’m thinking about the new words. There are too many.

People pay more attention to protecting environment. There _________ less pollution in the future.