Question

Fill in the blanks with suitable interrogative pronouns. 1. __do I have to call? 2. __ is behind the building? 3. __ was driving the car? 4. __ do you want for dinner? 5. To __ do I have to give this? 6. __ is going to take out the garbage? 7. __ is the colour of your pencil box? 8. __ is taking you to the dance class? 9. __ of these dresses would you like to buy? 10. __of these students have opted to go on the picnic?
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Answer 1

1. what
2. who
3. who
4. what
5. what
6. who
7. which
8. who
9. which
10. which.

Hope it helps you.