Combine the sentences by changing the italicized word group to an infinitive or infinitive phrase. Then write the complete sentence in the paragraph box.
The weather bureau uses balloons. They determine the temperature aloft.
(They determine the temperature aloft is italicized0)
okay..
So, could it be, The weather bureau uses balloons to determine the temperature aloft?
I’ll be happy to check the sentence you write by putting those sentences together as instructed.
Yes, but not with the question mark.
The weather bureau uses balloons to determine the temperature aloft.
To combine the sentences and change the italicized word group to an infinitive phrase, you can say:
The weather bureau uses balloons to determine the temperature aloft.
In this sentence, the infinitive phrase "to determine the temperature aloft" has been used to combine the two sentences into one. It explains the purpose or reason why the weather bureau uses balloons.