When he was a little boy，he ______ on the farm.
| A．used to working | B．used to work |
| C．got used to work | D．was used to work |
Don’t take___________ for granted ___________everyone should adore you.
| A．that; what | B．that; which | C．it; what | D．it; that |
The little boy is dirty from head to foot because he ___ in the mud all morning.
| A．has played | B．is playing | C．has been playing | D．was playing |
Her ________ look suggested that she was very _______ with the answer.
| A．satisfying；satisfied | B．satisfied；satisfying |
| C．satisfied； satisfied | D．satisfying；satisfying |
－Why didn’t Susan come to see us yesterday as she promised?
－______.
| A．She must be busy | B．She might have been free |
| C．She must have been busy | D．She can’t be free |
This book is well worth _______. Would you like to buy one?
| A．to read | B．being read | C．reading | D．to be read |