1．Eating too much fat can ________ heart disease and cause high blood pressure.
A. result from B. contribute to C. attend to D. devote to
2. Mr. Green stood up in defence of the 16-year old boy，_________ that he was not the one ____________.
A. said; blamed B. saying; to blame C. to say; to be blamed D. saying; blaming
3. __________ to sun, rain and wind for a long time, the stone split.
A. Being exposed B. Having exposed C. Exposed D. To expose
