Câu hỏi:

Before he did his homework, he __________ a TV show.

If I watch weather forecast regularly, I __________ when the storm strikes the city.

Find and correct the mistakes

We must act now before it is too late doing anything about the problem.

What is the most well-known __________ invention in the 19th century?

The students __________ for an exam at this time next week.

This is the first time I __________ seafood.

His father is going to repair the bike for him soon.

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