[填空题]At that very moment he considered (shout)（）for help.

[填空题]At that very moment he considered ( shout)（）for help.

[填空题]At that very moment he considered (shout) ______ for help.

[填空题]He helped the farmers to pick the apples.
He helped the farmers ______.

[单项选择]A．He hasn’t eaten well recently.
B．He’s been helping his sister a lot.
C．He can’t stop searching for work yet.
D．He’s been working on his paper constantly.

[填空题](As) secretary of transportation, he worked to help the (bankrupt railroads) in the northeastern (United States) (solved) their financial problems. A. As B. bankrupt railroads C. United States D. solved

[单项选择]Color is very important to most animals for it helps them to get along in the world. Color (21) to make an animal difficult for its enemies to (22) . Many animals match their (23) so well that as long as they do not move no one is (24) to see them. You probably have often "jumped" a rabbit. If you (25) , you know how the rabbit sits perfectly still (26) you are just a few feet away. You (27) see the rabbit till it runs for its (28) matches very closely the place where it is (29) . Many times you may have walked past a rabbit (30) didn’t run and you never knew it was there at all.
One of the most usual color schemes that helps animals to keep (31) being seen, is a dark back and light underpants. If an animal is the same color all (32) , there is always a dark shadow along the animal’s belly (腹部). (33) an enemy couldn’t see the animal he could see this dark shadow. The shad
A. conditions
B. surroundings
C. enemies
D. bodies