Mattayom 1 Entrance Exam - Spot the Mistake - Part 3

Can you spot the grammar mistakes? Click on the wrong words. There are TWO per sentence.
1. My grandfather plant an apple trees in the backyard.
2. Anna visits her best friend next weekend.
3. We are look forward for the new superhero movie.
4. They decide to bought a house near the beach.
5. My teacher told me to focusing in my grammar exercises.