That is the only way we can imagine _______ the overuse of water in students’ bathrooms.
A．reducing B．to reduce C．reduced D．reduce
Some 200 people were reported ______ in the earthquake which happened in Sichuan last month.
A．were killed B．to be killed C．killing D．to have been killed
The children in some remote areas are looking forward ______ a chance to receive further education.
A．for getting B．to getting C．to get D．of getting
A small car is big for family of three_______ you need more space for luggage.
A．once B．because C．if D．unless
The reason______ she failed to go to the party puzzled all of the people present.
A．what B．why C．as D．which
In the U.S, ______a tip is thought to be polite when paying the bill.
A．leave B．having left C．leaving D．being left
