Sam （）some knowledge of the computer just by watching others working on it.

单项选择题I have a lot of readings （） before the end of this term.

A. completing
B. to complete
C. completed
D. being completed

单项选择题I（）have watched that movie--it'll give me horrible dreams.

A. shouldn' t
B. needn' t
C. couldn't
D. mustn't

单项选择题—Do you think you could do without help —（）.This is not the first time for me.

A. Take care
B. Hurry up
C. Not exactly
D. Don't worry

单项选择题新课程改革中提出的课程“三维目标”是( )。

单项选择题考试时学生想起以前的知识作答，这种心理现象被称作( )。