51（）

单项选择题Snedekert Geren and Shafto based their study on children who（）

A．were finding it difficult to learn English.
B．were learning English at a later age than US children.
C．had come from a number of language backgrounds.
D．had taken English lessons in China.

单项选择题Two people might feel different emotions about the same thing.（）

A．Right
B．Wrong
C．Not mentioned