If it ________ for the life jacket, I would have drowned. A. is not B. was not C. has not been D. had not been

________, they would not have had such a successful conference. A. Due to good preparations B. But for they had had good preparations C. Without good preparations D. If their good preparations

I would have crashed the car ________. A. unless you warned me B. in case you warn me C. if there were a warning D. but for your warning

You should not eat more ________ yourself ill. A. or you will make B. in case you would make C. if you would make D. unless you would have made

Practice more and more ________ you can never speak English fluently. A. and B. or C. incase D. if

He may never speak to me again if he ________ out what happened. A. will find B. was finding C. finds D. had found

________, tell him I have gone to London. A. If Mr. Jones called B. Unless Mr. Jones calls C. Should Mr. Jones call D. If Mr. Jones will call

Call your parents ________ they will start to worry. A. if only B. otherwise C. if so D. in case

It was much colder than we had thought ________ we had taken more warm clothes. A. If B. Unless C. But for D. If only

If you ________ her, what ________? A. are / will you do B. have been / might you do C. were / would you do D. had been / will you have done

________ heavy traffic we would not have been late for the train. A. If B. If only C. Supposed D. But for

Our cat ________ you if you rub her belly. A. will **** B. would **** C. will have bitten D. would have bitten

________ you apologize for what you have done, I will never be your friend. A. Unless B. If C. As if D. Even if