问题补充:
I will buy you a new bike if you learn how to swim this summer.
Is that a ? I’m sure I’ll get the bike.
A. chance
B. promise
C. trick
D. treat
答案:
A. chance
(答案→)B. promise
C. trick
D. treat
解析:Chance是机会;promise是承诺;trick是把戏窍门;treat是治疗,款待。句意:今年夏天,如果你学会了如何游泳,我就给你买一辆新的自行车。——那是一个承诺吗?我敢肯定我能得到自行车。结合语境可知选B。