Perplexing sentences

Use a, an or the where necessary :

......ant has 6 legs. (My answer : An. Is 'The' OK, too?)

.....car has 4 wheels. (My answer : A . Is 'The' OK, too? )

.....week has 7 days. (My answer : A)

......chocolate is brown. (My answer : No article is needed)

. ......coffee is brown. (My answer : No article is needed)

......cucumber is green. (My answer : A)

.......flower is pink. (My answer : A)

......grass is green. (My answer : The)

.......team has 11 players. (My answer : A)

.......orange is orange. (My answer : The)

.......carrot is orange. (My answer : The)

.......strawberry is red. (My answer : The)

......banana is yellow. (My answer : The)

.....hand has 5 fingers. (My answer : A)

Am I right?