Which sentence contains an error in its future continuous or future perfect form?
The team promises the whole bridge report will be complete by Friday; by then, they will be writing it.✓Correct answer
At this time tomorrow, the gardeners will be planting the final flower bed.
By the end of the month, the charity will have collected its target amount.
At 6 p.m. tonight, I will be travelling through the mountain tunnel.
Explanation
The report is promised as complete by Friday, but the future continuous presents writing as still in progress then. A completion deadline requires the future perfect, unlike the other sentences, which correctly describe either an action underway at a moment or work completed by a deadline.