-- The math problem _________ is not difficult.
--- But after several tries , I have to give up _________ on it .
| A．it’s , working | B．itself , to work | C．itself , working | D．its , to work |
---Have you ever_____Peter?
---Of course. He is a top student in our school.
A picked up B heard about C written down D thought of
---________ have you played the piano? ---For four years.
A How often B How long C How much D How many
---How much did you _____ for the book? ---Twenty yuan.
A payB cost C takeD spend
---What do you want to do for those children in the countryside?
--- I want to ____ some money for them.
A raiseB payC giveD spend
---We haven’t seen Tim these days. ---He _______ America.
A has gone to B has been to C is going to D will go to