Complete the second sentence so that it means
the same as the first. use no more than three
words.
1 my teacher told me to give a talk about global warming.
i have
to give a talk about global
warming.
2 we do not often eat meat in our family.
meat is
in our family.
s you should protect your computer against viruses.
your computer against viruses.
my teeth are checked at the dentist's every six months.
i get
at the dentist's every six months.
5 someone lost a mobile phone on the train this morning.
a mobile phone tosted on the train this
morning.
6 marconi invented the radio.
the radio was
..marconi.
7 you should shut down your computer when you aren't
using it.
your computer
down when you aren't
using it.
8 the students have put the laptops back in the
cupboard.
the laptops
back in the cupboard by the
students.​

1. I have to give a talk about global warming because my teacher told me to.
In this sentence, we can combine the two sentences by using the word "because". "Because" is a conjunction that helps to explain the reason for something. So, the combined sentence would be: "I have to give a talk about global warming because my teacher told me to."

2. Meat is rare in our family.
To combine these two sentences, we need to find a word that shows scarcity or infrequency. The word "rare" fits here, as it means not happening often. So, the combined sentence would be: "Meat is rare in our family."

3. Protect your computer against viruses.
This sentence is already complete and doesn't need any changes.

4. I get my teeth checked at the dentist's every six months.
In this sentence, we can replace the phrase "at the dentist's" with the word "my" to make it shorter. So, the combined sentence would be: "I get my teeth checked every six months."

5. A mobile phone was lost on the train this morning.
To combine these sentences, we need to change the verb form from "lost" to "was lost" to indicate that the action happened to something. So, the combined sentence would be: "A mobile phone was lost on the train this morning."

6. The radio was invented by Marconi.
To combine these sentences, we need to transform the active sentence "Marconi invented the radio" into a passive sentence. In passive voice, the subject of the active sentence becomes the object. Additionally, the verb form changes from past simple to past participle ("invented" to "was invented"). So, the combined sentence would be: "The radio was invented by Marconi."

7. Shut your computer down when you aren't using it.
This sentence is already complete and doesn't need any changes.

8. The laptops have been put back in the cupboard by the students.
To combine these sentences, we need to transform the active sentence "The students have put the laptops back in the cupboard" into a passive sentence. In passive voice, the subject of the active sentence becomes the object. Additionally, the verb form changes from present perfect to present perfect passive ("have put" to "have been put"). So, the combined sentence would be: "The laptops have been put back in the cupboard by the students."