Ms Sue, could you please check my sentences, please? I still have a few doubts.

1) How long is it since you (last) played with the band? Since last year.
Or just last year.
2) How long ago did you last play with the band? A year ago.
When describing a picture in a book, would you use "at" or "in"?
3) In the left-hand bottom is possible?
In the bottom left of the picture I can see a woman dressed in a silk dress.
They were disappointed with/at/about the hotel room. (Which prepositions are possible?)

All are correct. In the last sentence, "with" is the best preposition.

Sure, I'd be happy to help you out with your sentences! Let's go through each of them, one by one.

1) In the first sentence, both "since last year" and "just last year" are correct. However, the word "just" implies that the action occurred very recently, while "since" suggests a longer period of time has passed since you last played with the band. So, depending on the context, you can choose either one that conveys the appropriate meaning.

2) The second sentence is also correct. "A year ago" is a clear and concise way to indicate the time frame of when you last played with the band.

3) When describing a picture in a book, it would be more appropriate to use the phrase "in the bottom left." You could say, "In the bottom left of the picture, I can see a woman dressed in a silk dress." This is because the bottom left refers to a specific location within the picture.

4) For the fourth sentence, all three prepositions - "with," "at," and "about" - can be used to express disappointment with the hotel room. So, you could say, "They were disappointed with the hotel room," "They were disappointed at the hotel room," or "They were disappointed about the hotel room." The choice between these prepositions may depend on the context or personal preference.

Remember, it's always a good idea to consider the context and intended meaning when choosing the appropriate words and phrases for your sentences.