While Helen __________ the guitar, her mother came in.
| A．was playing | B．is playing | C．played | D．plays |
________ book on the desk is _______ useful one.
| A．The;an | B．A;a | C．The;a | D．The;X |
The beautiful sight _____ us ______ all our problems .
| A．helps;forgets | B．help;forgets |
| C．helps;forget | D．help;forgets |
We both enjoy ___________ to _______.
| A．going partys | B．going parties |
| C．to go parties | D．to go partys |
Thank you very much ________ me.
| A．for ask | B．for asking | C．to asking | D．to ask |
Everyone ________ a good habit from an early age
| A．start | B．is starting | C．are starting | D．should start. |