What’s up? You look worried.Well,I_____on the problem for 5 hours but I haven’t got a single clue

As is known to us all, under no circumstances______ temporary economic development at the expense of the environment and resources.

The palace caught fire three times in the last century, and little of the original building _____ now.

Don’t believe him. This is just a story he ______.

28 You made a lot of mistakes in your composition, but __________ it is a good one