元认知策略包括监控策略、调节策略和______。

单项选择题Scientists say it may be a few years（）it is possible to test the new medicine on patient.

A. because
B. after
C. before
D. since

单项选择题The boy spends at least as much time reading as he （）

A. writes
B. is writing
C. does to write
D. does writing

单项选择题— What was he doing at this time yesterday — He （） to sing a song in English.

A. was trying
B. is tried
C. is trying
D. was tried

单项选择题I think basketball is（）I like to watch it.

A. boring
B. bored
C. exciting
D. excited

单项选择题This room is used （） a reading room.

A. as
B. for
C. by
D. in