[单选题]D.olphins are interesting because they_________ human behavior. at times.A. discussB. expressC.displayD. distribute
[单选题]B.ecause of the complexity of our modern machine, we need our workers ______.A. to train specialB. specified in trainingC. to have specified trainingD. training specially
[单选题]A.) AsB.) BecauseC.)ThoughD.)If
[主观题]The runners are very strong because they eat a lot of h______ food.
The man was very surprised because ( ).A. he thought the child's father was dead
[单选题][A] Although [B] Because [C] If [D] While
[单选题]A.) BecauseB.) AsC.) SinceD.) Although
[单选题]A.) butB.) becauseC.) unlessD.) when
B.ecause he used to drop a bill on the floor and stepped on it. C.Because he was
[单选题][A] because [B] made [C] instead [D] learnt