给出下列四个命题:①的对称轴为;②若函数的最小正周期是,则;③函数的最小值为;④函数在上是增函数. 其中正确命题的个数是( )
Bob takes interest intaking photos of sea birds.( )
is interested in
is interesting
is good at
is tired of
John will call you in advanceto tell you when and where to meet.( )
in a way
in time
later
ahead of time
Jason used to bethe last to leave school last month.( )
was used to
was often
was used
got used to
Why didn't you come to the meeting yesterday?
Sorry,I didn't know that I to come.( )
was asked
have asked
am asking
asked
Can you tell me his new car?( )
where did Mike buy
where bought Mike
where Mike buy
where Mike bought