It takes him two hours _______ his homework every night.

She said ______ she was having a party for Lana.

Remember to save what you ________ on once in a while in case the computer suddenly crashes.[ ]

in failed to be admitted by Hong KongUniversity last year, and only then _______ the importance of English

The young man used to _______ to work,buthe is used to _______to work now.