I will buy you a new bike if you learn how to swim this summer.Is that a ( ) I'm sure l'll get the bike.

问题描述:

I will buy you a new bike if you learn how to swim this summer.Is that a ( ) I'm sure l'll get the bike.
A.chance
B.promise
C.trick
D.treat

A分析一下喔看错了应选BA意思为机会,B意思为承诺,