posted by John .
Thank you for your correction!
1. He needs two canned foods.
1-1. He needs two kinds of canned food.
(Are they wrong sentences?)
2. He needs a canned coke to drink.
3. Shall we have some pizza at a MacDonald's.
(Check the sentences, plese.)
4. Shall we ride a bicycle in/on/at the park? (Which preposition do I have to use? Are all OK?)
5. An old couple found two seats in/on the train. (Are both prepositions OK?)
6. A: Did you see my bag? It was here on this seat. B: Your bag? I heard a ticking sound/noise from the bag. I was so scared, so I threw it out the window. A bomb must have been in the bag.
A: A bomb? Oh,no! It was my clock!
(Is the short dialogue grammatical?)
1 is incorrect; 1-1 is perfect.
2 is fine.
3 is OK except for the end -- "...McDonald's?"
4 should be "in the park."
5 should be "on the train." (Don't ask me why!! It's just idiomatic!)
6 is wonderful!! (You can use either "sound" or "noise"; either one works.)
If you are doing a conversation, as you seem to be doing in 6, you might what to put the sentences in quotes. (Essentially, you are quoting what is being said.)
Also a new paragraph is used to indicate changes in ideas, times, places or speakers.
"Did you see my bag? It was here on this seat."
"Your bag? I heard a ticking noise from the bag. I was so scared, so I threw it out the window. A bomb must have been in the bag."
"A bomb? Oh,no! It was my clock!"
I hope this helps a little more. thanks for asking.