There __________ an earthquake (地震)in Lushan on the 20th of April.A. is B. was C. is going to be
_____ you have a nice trip to Beijing? A.Do B.Are C. Did
live with ____ mother and father. A.we B.us C. our
--What are you doing? ---- I am _____ a letter. A.sending B. writing C.Both A and B
What is ____ envelope? A. a B.an C ./
We put the address on _____ right. A.a B.an C.the