Find the one mistake (A, B, C or D) in these sentences and then correct them

(A) Because of her father (B) has been (C) seriously ill, she (D) can’t go to the meeting.

Last week (A) unless my mother (B) had had (C) enough money, she (D) would have bought that toy for me.

There were so many different _______ of bread that I didn't know which to buy.

(A) Though Linh was (B) not good at (C) playing badminton, she managed (D) to win her opponents.

(A) This water isn’t (B) warm enough for the (C) young boys (D) to swim.

Choose the correct words to complete the sentences

  The plot was surrounded by a stone wall and _______ with flowering trees.

He (A) is known that (B) these questions are (C) so difficult that he (D) can’t answer them.