—Will you come to the bars(网吧)with me? 

—Sorry,my mother always tells me _______ there.

                                                                                                                                                        [ ]

A. not go

B. go

C. not to go

D. to go

钛合金铣削不宜采用（）类合金。

A.YG

B.YH

C.YT

D.YW