25.　 Looking at the fallen apple on the ground, Newton was lost _____ thought.

Keys: 1.with 2. to 3. with 4. in/by 5.for 6.to 7.of 8.upon 9.for 10.like

24.　 All the middle schools in this city are equipped _____ computers.

23.　 I am looking forward ______ visiting Charlie Chaplin Museum.

22.　 Organic farmers insist ______ changing crops every two or three years.

21.　 Farmers often grow the same crop year ______ year.

20.　 “Organic farming” also refers ____ crops growing ___ natural rather than chemical fertilizer.

19.　 Dr Yuan awoke ___ his dream _____ the hope of producing a kind of rice that could feed more people.

18.　 Dr Yuan cares little ______ spending the money ______ himself.

17.　 Thanks ______ his research, the UN is trying to rid the world ______ hunger.

16.　 As a young man, Yuan Longping saw the great need ______ increasing the rice output.