21. Friendships between girls are usually anchored in shared feelings and support, but friendships between boys are _____ shared activities or interests.
A. based on B. relied on C. focused on D. spied on
22. Easter Island, which was almost uninhabited when it was discovered on Easter Day in 1722 by a Dutch captain, is covered with hundreds of giant statues, each ______ten meters tall.
A. measuring B. measures C. measured D. to measure
23. — I am worn out.
— Me too, all work and no play. So it’s time to ________.
A. burn the midnight oil B. push the limits C. go with the flow D. call it a day
24.On July 7, 1937, the Japanese pretended ________ a Japanese soldier near the Marco Polo Bridge to start a full invasion of China.
A．losing B．to have lost C．to lose D．lost
