1. Jumping out of _______ airplane at ten thousand feet is quite _______ exciting experience．
A. an; an B. the; the C. 不填; the D. 不填; an
2. The engine of the bus was out of order and the bad weather _____ the worries of the passengers.
A. added up B. added to C. resulted from D. made of
3. --- Do you think John is coming to attend the lecture?
--- Sure. I have ______ him to.
A. advised B. suggested C. persuaded D. supposed
