A．感知运动阶段B．前运算阶段C．具体运算阶段D．形式运算阶段皮亚杰的认知发展阶段分为( )。……

单项选择题I don't know the man over there. Could you tell me ().

A. what his name is
B. where does he come from
C. how old is he
D. what is his name

单项选择题Students taking the entrance exam are required to provide their students ()number.

A. identify
B. identifiable
C. identifiably
D. identification

单项选择题According to the travel Web site, many travelers () staying at the Reliant Hotel in Hanoi.

A. testify
B. conclude
C. recommend
D. disappoint

单项选择题Although subway fare was cheaper, Danielle chose to take a taxi to the concert hall () she would not be late.

A. so
B. or
C. but
D. and

单项选择题I've never () him before.

A. heard of
B. hear from
C. heard to
D. hear of