It is the first time I ____ to visit the Great Wall.
Boys and girls, please have a seat and ____.—Thank you.
_____ well you drive, you must drive carefully. [ ]
It is his great pleasure to be ____________ with the highest reward by the president.
Miss Smith never wastes money on anything too expensive, even though she can ________ to. – Yes, she does. She has given much of her money to charities.