Hello Mi Jin!
Thank you for your homework. Almost all were correct except the following sentences which I corrected.
Keep in mind the use of many ( countable) and much(non-countable) nouns.
T. Aki~
There isn't many butter on the table.
>>> There isn't much butter on the table.
There isn't many cheese in the sandwich.
>>There isn't much cheese in the sandwich.
How much students are in your class?
>>> How many students are in your class?
There isn't many flour left for baking.
>>> There isn't much flour left for baking.