G9 - SM - Unit 10 - relative clauses (3)

We are meeting an astronomer tonight. This astronomer has discovered three Earth-like planets.

->The astronomer (a)   has discovered three Earth-like planets

Dennis Tito became the first space tourist in 2001. Anousheh Ansari travelled into space as a tourist in 2006.

--> When Anousheh Ansari travelled into space as a tourist in 2006, (a)  

I'm reading an article. The article is about NASA's plans to return humans to the moon.

--> I'm reading (a)   NASA's plans to return humans to the moon.

Neil Armstrong and Buzz Aldrin planted an American flag on the moon. They spoke to President Richard Nixon after that.

--> Before Neil Armstrong and Buzz Aldrin spoke to President Richard Nixon, (a)  

Last week they visited a museum. The first artificial satellite is on display there.

--> Last week they (a)  

Intel computers are very good. They are made in India. (defining relative clause)

--> Intel computers (a)  

This is the newspaper. I want you to buy it. (defining relative clause)

This is the newspaper (a)  

My cousin often visited me when he lived in Ha Noi. (used to)

--> My cousin (a)  

She doesn't want to mention the cause. She divorced her husband for this cause. (defining relative clause)

--> She doesn't want to mention the cause (a)  

I'll show you the second-hand bookshop. You can find valuable books in this shop. (defining relative clause)

--> I'll show you the second-hand bookshop (a)