Question words before To infinitive
1. have you decided ..... to cook for dinner this evening ? ( who / whom / what / why )
2. She didn't know ....... or stay ( to go /whether to go / if to go / if that she go )
3. Have you decided what place ........ on your next holiday ? ( visit / will visit / to visit / you visted )
4. Can you tell me how to .... this washing machine ? ( to operate / I could operate / operating / could I operate )
5. They đin't know .... during their holiday ( whether to do / how to do / what to do / why to do )
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