—Why was Mrs Smith angry with Jack?—Because he worked than the others.A. more carefullyB.

问题补充：

—Why was Mrs Smith angry with Jack?

—Because he worked than the others.

A. more carefully

B. worse

C. better

D. more clearly

答案：

A. more carefully

(答案→)B. worse

C. better

D. more clearly

解析：史密斯老师生气的原因按照常理来说应该是杰克做的不好，比别的同学，选项中只有worse表示更差的意思，与题意相符，故选B。