[单项选择]Some of his suggestions had been rejected ______ they were not practicable.
A. as
B. when
C. until
D. if

[单项选择]Some of his suggestions had been rejected（　） they were not practicable.
A. as
B. when
C. until
D. if

[单项选择]Some important documents had been missing.

[单项选择]（）all his money, Jamie had to borrow some from his parents
A. Spending
B. Spent  
C. Being spent
D. Having spent

[单项选择]Some of his suggestions have been adopted but others have been turned（）as quite impractical.
A. away
B. back
C. our
D. down

[单项选择]Some of his suggestions have been adopted, but others have been ______ as they are quite impracticable.

[单项选择]When he heard that his parents had been seriously ______ in the traffic accident, he burst into tears.


A. wounded
B. injured
C. damaged
D. hurt

[单项选择]

For some time past it had been widely accepted that babies—and other creatures—learn to do things because certain acts lead to "rewards"; and there was no reason to doubt that this is true. But it used also to be widely believed that effective rewards, at least in the early stages, had to be directly related to such basic physiological(生理的) "drives" as thirst or hunger. In other words, a baby would learn if he got food or drink or some sort of physical comfort, not otherwise.
It is now clear that this is not so. Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome.
Papousek began his studies by using milk in the normal way to "reward" the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed that a baby who had had enough to drink would refuse- the milk but would still go on making the lea
A. the lights were directly related to some basic "drives"
B. the sight of the lights was interesting
C. they need not turn back to watch the lights
D. they succeeded in "switching on" the lights