The notice says _________ you are, you must show your tickets to enter the exhibition.
| A．whoever | B．who | C．however | D．Whom |
The next thing he saw was smoke ________ from behind the house.
A rose B to rise C rising D risen
________ the website of the Fire Department in your city, and you will learn a lot about firefighting.
A Having searchedB To searchC SearchingD Search
_________ that government can lead them out of the financial crisis, people are optimistic about the future of the country.
A ConvincingB Convinced C To convince D Having convinced
The monitor suggestedto the Sea World in the summer vacation.
| A．to me visiting | B．their visiting | C．to me their visit | D．they visit |
He was busy writing the exam paper , only ___once in a while to check the time.
| A．to stop | B．stopping | C．to have stopped | D．having stopped |