—How do you find the health club?—I . Everyone is saying its management is going from bad to worse
Some scientists think there are _______ 2,000 million flashes of lightning per year.
Whenever we are in ______ trouble, we should never lose______ heart.
We all know that, __________, the situation will get worse.
—Can I join the club, Dad?—You can when you _____ a bit older.
If you are in any doubt as to _____ you should be doing these exercises, consult your doctor.