如果曲线C上的点满足则下列说法正确的是（ ）A 曲线C的方程是 B 方程的曲线是CC 坐标满足方程的点在曲线C上 D 坐标不满足方程的点不在曲线C上
Many wild animals are_____，and it's time for us to do whatever we can to protect them．（ ）
on duty
on show
in order
in danger
Mr．Black's memory is getting____．As a result，he often leaves his keys at home．（ ）
older
poorer
greater
better
When the baby dog____，it was very hungry．So we gave it some food．（ ）
is found
was found
has been found
will be found
Helen has got two brothers．_____of them likes chocolate，but she loves it．（ ）
Neither
None
Each
Any
Cathy has such a good_____that she won many prizes in singing competitions last year．（ ）
sleep
idea
voice
time
则下列说法正确的是（ ）
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