21. Scientists have invented new devices to help people live a longer life.
New devices …………
22.I don’t have enough time , so I can’t go on holiday this summer.
If I had enough money, I could go on a long holiday this year.
23.The man had a broken leg. He tried to save his wife
.-In spie of……………………………
24. I can’t tell you because I don’t know the answer.
If …………………………
25.They will do the test well. They will review them all hard.
If……………………………………