美国历史上被称为“网球内阁”的时任总统是（）。

A、林肯

B、罗斯福

C、里根

D、肯尼迪

It became a key feature of the Oral Approach in the 1960s that（）.

A. new language is introduced and practised in situations

B. accuracy is maintained

C. reading and writing are introduced later

D. translation should be avoided