The math problem is too difficult ,I can’t__________ .
| A．work out it | B．work it out |
| C．work them out | D．put it out |
You’d better ____ too much meat. You are much too fat.
| A．not eat | B．eat | C．not to eat | D．don’t eat |
Would you mind _______ the window for me? I feel a little cold.
| A．opening | B．closing | C．to close | D．to open |
—Where is Maria?
— I saw her ______basketball just now.
| A．played | B．to play | C．playing | D．plays |
The words that we should pay attention to_______on the blackboard.
| A．is writing | B．being written | C．are written | D．writing |
You can’t imagine what difficulty we had________home in the snowstorm.
| A．walked | B．walking | C．to walk | D．walk |