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Alexander Graham Bell (invent) ___________ the telephone when Thomas Edison (complete) ___________ his second model of the phonograph in 1887.
had invented _ completed
National Geographic, one of the most influential magazines, (appear) ___________ in 1899, which (help) ___________ to increase readers' cultural awareness and understanding through high-quality photo essays
appeared _helped
The lung cancer mortality rate (rise) ___________ six-fold in males when mass media (start) ___________ covering the health risks of smoking.
had risen___started
Linda only (understand) ___________ the film after she (read) ___________ the book.
understood_had read
A: you ever (appear) ___________ on TV before you (take part) ___________ in this reality show? B: Yes, I (have) ___________.
had_appeared_took part _ had
I can't believe I (get) ___________ the position of a TV announcer. I (submit) ___________ my application two months ago, but I did not think I had a chance getting it. When I (show) ___________ up at the interview, there were at least fift
got-submitted-showed-had arrived
All job applicants (finish, already) ___________ their interviews and (leave) ___________ when I (arrive) ___________.
had already finished __ left ___arrived.
Complete the following sentence: Minh's grandpa got a laptop after he ______________.
Minh's granda got a laptop after he had used the library's computer to get access to the Internet.
Complete the sentence: Nam had already downloaded the information for his essay when his classmate Lucy ______________.
Nam had already downloaded the information for his essay when his classmate Lucy rang his doorbell.
Complete the sentence: After the students had carried out a survey on the use of the internet and analysed the related data, ______________.
After the students had carried out a survey on the use of the Internet and analysed the related data, they began drawing their charts
Complete the sentence: Lan had spent three days doing research on social media when ______________.
Lan had spent three days doing research on social media when the teacher changed the topic.
