practice1
Insert the comma and suitable coordinators (for, and, nor, but, or, yet, so) that logically connects the two or more thoughts in each sentence 
1. Nowadays, computer are widely used in scientific research, and (so) it enables us connect with worldwide libraries 
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2. Airplane had received permission from the owner / they could not take off 
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3. The tendency of this century is global integration, so many schools are starting to emphasize the study of foreign language and informatis more than they did in the past 
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4. many people do not throw rubbish into dustbin along the road, so they do not classify the house-hold waste
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5. television badly affect the watchers health, so scientists and doctors need to diagnose the problem and recommend for treatment 
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6. a nuclear weapon is more dangerous than any other weapon, yet many nation in the world are producing this kind of weapon 
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7. group work teaches students cooperation, and it helps them self-confident in communication ..........................................................................
8. karaoke is an interesting from of entertainment, yet it causes brain damage 
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Trúc:Hello Mai,Did you go to the Van Anh's birthday party,Mai?

Mai:Yes,I did.We had lot of fun.I like it very much.

Truc:Yes,I did too.And tomorrow,us school has Join the funfair.Did you go to there?

Mai:Ummm......Yes,I did.We had funny.

Truc:Ok.

Lan:Hey,Tomorrow in the afternoon,I and you go to the zoo.It's so fun.Did you go to the zoo with me?

Mai and Truc:Oh no.

Mai:No,I didn't.Us school has join the funfair.Truc and I not go to the zoo with you.Sorry,Lan.But did you go there?

Lan:Okay.I did.

Truc:Let's go to the school,Mai and Lan.

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