25. Butterflies ______ a sweet liquid produced by flowers, which bees and other insects collect。 A. carry on B. feed on C. put on D. focus on

26. In much of the animal world, night is the time ______ for sleep—pure and simple。 A. set aside B. set down C. set off D. set up

27. People complain that decisions to approve or deny a permit are often ______ rather than based

on fixed criteria。

A. appropriate B. conscious C. arbitrary D. controversial

28. He didn’t selfishly keep for himself the money inherited from his uncle. Instead, he made a

______ contribution to help the community。

A. commercial B. generous C. comparable D. profitable

29. Don’t defend him any more. It’s obvious that he ______ destroyed the fence of the garden even

without apology。

A. accidentally B. carelessly C. deliberately D. clumsily

30. An artist who was recently traveling on a ferry to the southern island discovered ______ a long

lost antique Greek vase。

A. at random B. by chance C. in turn D. on occasion

Zigfried, a little mouse, blew his breath on the frosty window of the farmhouse and rubbed it to see the outside. Still nobody came. Maybe today, he thought 31 . It was only a few days before Christmas and he was watching for a miracle (奇迹)。

This farmhouse had been 32 too long. It needed a family. Zigfried’s

33 made a noise. He realized that he hadn’t eaten anything since yesterday. He jumped from the windowsill (窗沿)， grabbed a 34 from his home, and went next door to Farmer Mike’s。

Farmer Mike’s house had been a great place for the little mouse 35 the farmer married a wife who had a cat. Zigfried 36 when he thought of it. He looked around cautiously as he 37 into