_______that he was in great danger, Eric walked deeper into the forest.
| A．Not realized | B．Not to realize | C．Not realizing | D．Not to have realized |
He asked _____________ for the piano.
| A．did I pay how much | B．how much I paid |
| C．I paid how much | D．how much did I pay |
There are a great number of words in the English language ______________ on colors.
A. based B. base C basing D. is based
--- Daddy, I don’t want to go to Jimmy’s birthday.
--- You had better go. ____ you make a promise, you have to keep it.
| A．Once | B．Even if | C．Unless | D．In case |
Mary said they _____________________with each other for six years before they got married.
| A．has fallen in love | B．had fallen in love | C．had been in love | D．has been in love |
--- My sister is very upset today.
--- It is your fault. You ________________ the bad news to her yesterday.
| A．should tell | B．should have told |
| C．shouldn’t tell | D．shouldn’t have told |