Relative pronouns

Front

She is talking about the author________book is a best-seller this year.

Back

whose

Front

He bought all the books needed for the next exam __________.

Back

which

Front

The exercises we are doing________very easy.

Back

are

Front

Neil Armstrong was the first person _______ step on the moon?

Back

who

Front

Dui hơm?

Back

dui