Please validate the below answers

The new medicine has helped many people feel better since it ________ last year.
(A) was introduced
(B) introduced
(C) has introduced
(D) was introducing

Ans: A

Joyce: Aren't you going to Shanghai for the conference? Ronnie: Yes. At this time tomorrow, I ____________ across the Pacific Ocean!
(A) would be flying
(B) am flying
(C) will be flying
(D) would fly
Ans : C

He ________ in so much trouble last week if he'd followed the guidelines more carefully.
(A) hadn't been
(B) wouldn't have been
(C) might have been
(D) wouldn't be
Ans : B

He ________ in that company when he had the chance.
(A) should invest
(B) would have been invested
(C) could be investing
(D) should have invested
Ans: D

I wouldn't plan the New York conference in the winter if I ________ to please the staff.
(A) hope
(B) were hoping
(C) should hope
(D) am hoping

Ans : B
This lawsuit isn't really about money. ________ is making a personal statement.
(A) The person filing the suit
(B) It's about
(C) It's about the person
(D) Whoever

Ans : B