Milk will turn sour soon on hot days it is stored in the refrigerator．A．sinceB．untilC．because——青夏教育精英家教网——

Milk will turn sour soon on hot days ______ it is stored in the refrigerator．

A．since	B．until
C．because	D．unless

Children’s brains cannot develop properly _________ they lack protein.

The relatives of the passengers in the missing Flight MH370 cann’t hide their feelings, _____ they can make sure that the plane will make a safe landing on the airport.

A．except when

C．except that

D．except where

Two professors at Harvard University published a study of 3,300 new graduates, looking at ______ their names had any bearing on their academic performance.

The role of Chinese Dama in the economy has been over-estimated by some western media ______ their “gold rush” has had little influence on gold prices.

- We've only got this small bookcase. Will that do?
- No, _ _ I am looking for is something much bigger and stronger.

The map is one of the best tools a man has _ _ he goes to a new place.

________ I can see, there is only one possible way to keep away from the danger.

______ I met him, I always think of the thing that happened between us.

The survey shows that ______ we are enjoying less and less good sleep, rates of heart diseases have risen rapidly．

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