1. It is surprising that every time I ______ these figures up, I get a different answer.
A. join B. add C. mix D. put
2. Someone called me up in the middle of the night, but they hung up______ I could answer the phone.
A. as B. since C. until D. before
3. She looks very young but ______she is more than thirty years old.
A. fortunately B. actually C. happily D. strangely
