While we are very interested in Realcine,we will still need much more information we can make a decision to use it.

AIDS is said_______ the biggest health challenge to both men and women in the earth over the past four years.

known to us all, success usually results from diligence while laziness and copying others _____ can lead to losses and failure.

When the reached the top of the hill, they _____ so they had to stop for a rest.

I don’thave a partner to practice English_____. –Why not join an Englishlanguage club to practice_____