What (happen)........................................... if my parachute does not open?

A. If he doesn’t step on the mine, it doesn’t explode.

B. If he doesn’t step on the mine, it won’t explode.

C. If he didn’t step on the mine, it wouldn’t explode.

D. If he hadn’t stepped on the mine, it wouldn’t have exploded.

A. tour

B. trip

C. voyage

D. travel

A. If I know Philosophy, I can answer your question.

B. If I know Philosophy, I will be answer your question.

C. If I knew Philosophy, I would be able to answer your question.

D. If I had known Philosophy, I would have been to answer your question.

A. If he had missed it, he would have been late for his interview.

B. If he missed it, he would have been late for his interview.

C. If he had missed it, he would be late for his interview.

D. If he had missed it, he would had be late for his interview.