His parents died when he was young, so he had to .
| A．drop in |
| B．drop on |
| C．drop out |
| D．drop at |
The father as well as his three children____ skating on the frozen river every Sunday afternoon in winter
| A．go | B．is going |
| C．are going | D．goes |
The little girl ______go to the cinema rather than ______ at home alone that night.
| A．preferred ; stay | B．prefers to ; staying |
| C．preferred to ; stay | D．prefers to ; stay |
The alarm ________ when the thieves got in.
| A．went off | B．went over |
| C．turned over | D．took over |
The two boys ______when climbing the mountains.
| A．got lost | B．lost |
| C．were losing | D．losing |
It ______me one hour to finish the homework.
| A．spent | B．took |
| C．cost | D．paid |