13.—Will it snow tomorrow？

—_____.Then we can make a snowman.（  ）

A.I hate it

B.I hope so

C.No， it won’t

D.I don’t think so

13.B【解析】句意：—明天会下雪吗？—希望会，那样我们就能堆雪人。故选B。

14.In language testing._____refers to the effect the tests have on the teaching and learning.（  ）

A.reliability

B.validity

C.washback

D.practicality

14.C【解析】“反拨效应(washback or backwash)”指语言测试对教与学带来的冲击和影响。

15.“Most dog owners are convinced that their four-legged friends know exactly what they mean when they use certain words like sit， stay or treat.”The function of the underlined part is .（  ）

A.a subject clause

B.an adverbial clause

C.an object clause

D.an attributive clause

15.B【解析】句意：大多数狗的主人都相信当他们使用某些词，如坐、住或招待时，他们的四脚朋友知道他们的意思。由句意可知，画线部分为when引导的时间状语从句。故选B。