Question

1. Our schoolyard looks very boring ( plant more flowers)

Answer 1

1. Our schoolyard looks very boring ( plant more flowers)
If I were you I would plant more flowers.

Answer 2

1. Наш школьный двор выглядит очень скучно ( сажать больше цветов)

Answer 3

It sounds like you want to suggest improving the appearance of your schoolyard by planting more flowers. Here's a rephrased version of your statement:

"Our schoolyard appears quite dull. I recommend adding more flowers to enhance its aesthetic appeal."