已知等差数列an满足a1+a2+a3+⋯+a101=0则有( )

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A： $a_{1} + a_{101} > 0$

B： $a_{2} + a_{100} < 0$

C： $a_{3} + a_{99} = 0$

D： $a_{51} = 51$

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My name is Lily. I'm eight years old. This is my sister. Her name is Lucy. We are twins(双胞胎).Our hair is brown. Our eyes are blue. We look the same(一样), but I like pink. My T-shirt is pink. My shorts are white. Lucy likes orange. Her T-shirt is orange. Her shorts are black. I have a green schoolbag. Lucy's schoolbag is brown.

Lily		Lucy
hair	brown	①____	brown
②____	blue	eyes	blue
T-shirt	③____	T-shirt	④____
shorts	⑤____	shorts	⑥____
schoolbag	⑦____	schoolbag	⑧____

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