用所给单词的适当形式填空。  

1. We ___(play) football yesterday afternoon.

2. We should keep ___(diary)every day.

3. He invited me ___ (go) to a movie.

4. Do you know the girl ___ (name) Mary?

5. He wants her daughter ___(be) a nurse.

6. Our teachers told us       (finish) homework on time.

用英语材料测验母语是英语的被试，发现词语的加工时间与词语的使用频率负相关，改变语种后该结论依然正确，因此说，该研究结论具有良好的（）。

A.精确度

B.信度

C.构想效度

D.内部效度

E.外部效度