1.A Half 一半

例句：He met with the Prime Minister of Japan for an hour and a half.
他和日本首相会晤了一个半小时。

2.as well as 讲清楚

例句：Boys as well as girls are taught cookery in school these days.
现在学校里男女学生都学烹饪。
3.a small test 小测试
例句：Right now, we are running a small test of a new Google News homepage design.
目前，我们正在对“谷歌新闻”的页面设计进行小小的测试。

4.Say after sb 跟着某人说

例句：Listen again and say it after me.
再听一遍，然后跟我说。