Fill in the blanks with when, where, what, or how to complete the sentences.

1.I have so many ingredients, but I don't know___to make!

2.This city is so expensive. I don't know___to live.

3.I want to marry my girlfriend, but I'm not sure___to propose.

4.Help! My room is infested with ants. I don't know___to do!

5.Help me decide___  to go on vacation.

6.Do you know___  to do if you are stung by a bee?

7.My husband and I are so busy these days. We don't know___  to celebrate our anniversary.

8.I want to speak better English, but I don't know___  to do that.

Bài tập 2: 

Rewrite the following sentences using question words+ to- infinitives

1. We don't know where we should put the sofa.

......................................................................................................

2. The rules didn't specify who I should speak to in case of an emergency.

......................................................................................................

3. Mai wondered how she could ride the scooter.

......................................................................................................

4.Let us decide when we should start the project.

......................................................................................................

5.Could you tell me where I can find a good hotel?

......................................................................................................

6.We must find out what we are to do next.

......................................................................................................

7.A good dictionary tells you how you should pronounce the words.

......................................................................................................

8.We are not sure who we will meet at the entrance.

......................................................................................................

9.I can't remember when I have to turn off the oven.

......................................................................................................

10.Do you know what you should look for?

......................................................................................................