下列各数中，不可能是一个三角形的边长的是[ ]

A.5，12，13

B.5，7，7

C.5，7，12

D.101，102，103

All the children on the playground stared up into the sky until the noise of the plane _____.[ ]

A. gave up        

B. took off            

C. went out          

D. died away