1. They are singing a group song which tense

Present

Explanation:

They are singing a group song in present

They sang a group song is past

The are going to sing a group sog is future

Key word is are

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the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."

1. list two reasons why fossil fuels should continue to be used as a source of energy in america.