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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

The reason______ she failed to go to the party puzzled all of the people present.

A．what             B．why              C．as               D．which

A small car is big for family of three_______ you need more space for luggage.

A．once             B．because           C．if                D．unless

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

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

That is the only way we can imagine _______ the overuse of water in students’ bathrooms.

A．reducing          B．to reduce         C．reduced          D．reduce

We were swimming in the lake _____ suddenly the storm started.

A．when            B．while             C．until             D．before

Jackson returned to Seattle for a while, ______ to Canada, and worked a few jobs there before heading for New York .

A．moving           B．moved            C．being moved       D．having moved

David apologized for _______to inform me of the change in the plan.

A．his being not able                       B．him not to be able

C．his not being able                       D．him to be not able

The old man has expected to see all his children when he was in hospital, but ______ came to see him.

A．none             B．no one            C．someone          D．anyone