The latest study is very helpful in that ______.
A. it can take clearer pictures of teenagers' brains
B. scientists will meet with fewer, dangers in their research work
C. it may help scientists understand better the mental illness in teenagers
D. it may enable teenagers to experience fewer dangers during teenager years
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The earthquake happened in south Xinjiang on Feb. This ______ killed 266 people.
A. casualty
B. collapse
C. calamity
D. crater
Lyderic Bocquet drilled lots of small pits in the stone in order to ______.
A. make it look smarter
B. reduce the water drag
C. increase the revolution of the stone
D. make the game more like golf
A highly controversial explanation proposed by string theorists is that ______.
A. magnetic fields affect gravity subtly
B. G is larger near the Earth's poles
C. G has a number of hidden dimensions
D. discrepancies emerge between measures of G
How many months old does child play with sounds not only for enjoyment？
A. three months
B. two months
C. five months
D. six months
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