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
__________ is often the case with her, my mother talked about my study for at least half an hour nonstop before she drove me to school yesterday．
A． As B． Which C． What D． That
The girl had hardly rung the bell __________ the door was opened suddenly, and a birthday party was waiting for her．
A． until B． since C． when D． after
