help confused
In Questions 19–20, read each sentence, and decide whether the (words in brackets) contains a mistake. If so, identify the best way to correct or improve the sentence by choosing the appropriate suggestion from the answer choices. If the underlined portion requires no correction or improvement, choose No improvement or correction is required
19.
(It is fortunate that you were able) to fix the faucet because we need to use the water.
AIt was fortunate that you were able
BB- It is fortunate that you will have been able
CC -It were fortunate that you were able
DD- It is being fortunate that you are able
EE -No improvement or correction is required.
If you are going to the concert, (you should buy tickets in advance).
Aadvance tickets should be bought
Btickets should be bought in advance
Ctickets should have been bought in advance
Dshould buy advance tickets
ENo improvement or correction is required.
