=>
1. had learned
2. would be
3. would use
4. has just been bought
1. English is an official language in Malaysia.
2. Dean wanted to know if aliens could communicate verbally.
1. Land told me that she would hand in her assignment to the teacher the next day.
2. If there weren't so many billboards in our city, people could enjoy the view.
1. Albert Einstein's theories have made a great contribution to the development of modern science.
2. If he doesn't study hard, he will fail the exam.