Interrogative Pronouns

The pronouns who, whom, whose, what and which are called interrogative pronouns because they are used for asking questions.

• Who is he?
• What did you do then?

This grammar exercise tests your ability to use different verb forms correctly. Fill in the blanks with an appropriate verb form.

1. A team of US scientists ………………. how bacteria communicate with each other.

Complete the given passage.

European Space Agency’s Venus Express Mission ………1…… (solves / solved / has solved) many of the mysteries surrounding Venus. Venus is the planet closest ……2….. (to /with / by) earth not just in distance, but also ……..3…… (in / on) size.

Complete the given passage with appropriate prepositions.

Fill in the blanks.

Fill in the blanks with an appropriate tense form.

Fill in the blanks with an appropriate tense form.