Study harder, and you _______ better grades.
We have been in No. 7 Middle School ____ three years. A. since B. in C. for
Hainan celebrated(庆祝)her twentieth birthday ____ April 26,2008. A. in B. at C. on
–What do you call this in English?–It’s stamp. It is used ____ sending letters.
Nobody can stop me ____ working hard at English.
Our sports meeting has been ____ till next Monday because of the bad weather.