--- Mike, what did our monitor say just now? --- Every boy and every girl as well as the teachers who _____ to visit the museum _____ asked to be at the school gate before 6:30 in the morning.
You cannot tell________looking at someone whether or not he has HIV.
The days are gone________you can breathe fresh,unpolluted air or drink clean, unpolluted water in the countryside.
Learn some relaxation exercises and do them every time you feel________.
Many young people don't work hard, and regret it later when the opportunity is gone.They only realize it________it is too late.
Everybody needs calcium, but it is quite possible for a similar person to be totally healthy by eating only________.