She's ________ a letter.A.write B.writeing C.writing
I can stand. I have four ______. A.back B.hand C.legs
---What’s 9______3?---It’s 12.A.and B.in C.an
_________to see you. A.Glad B.Good C.OK
---What are you doing? ---I am _________TV. A.seeing B.looking C.watching
Happy birthday _______you. A.to B.for C.on