1.keeping the environment clean is very important
=>......................................................................................
2.they will show the time machine to the public this month
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3.it's three years since I last spoke to her
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4.he studied very hard, but he didn't pass the exam
=>Although he.................................................................
5.I couldn't do the test although it wasn't difficult
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6.Although he got up early, he was late for the first train
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It’s very important to keep the environment clean
The time machine will be shown to the public this month
I haven’t spoken to her for three years
Although he studied hard, he didn't pass the exam
In spite of the fact that the test wasn’t difficult, I couldn’t do the test
In spite of getting up early, he was late for the first train