You should take ____________ measures to improve your working conditions．
A． impressive B． effective C． attractive D． conservative
No person __________ carry a mobile phone into the examination room during the national college Entrance Examinations．
A． shall B． must C． can D． need
So far this year we __________ a rapid rise in food prices by between 10 and 20 percent．
A． experience B． had experienced
C． experienced D． have experienced
_______ about the man wearing sunglasses during night that he was determined to follow him．
A． So curious the detective was B． So curious was the detective
C． How curious was the detective D． How curious the detective was
I really don’t know how to thank you , but for your help, I ______ my lost necklace．
A． couldn’t have found B． mustn’t have found
C． couldn’t find D． wouldn’t find
I don’t think his daughter is able to mend a computer, ________?
A． does he B． isn’t she C． doesn’t he D． is she
