When one makes new friends, don’t forget_____ old ones.

How long hasTom _______ Nancy 一I don’t know.And I even didn’t know they ______ .

Do you know ______– To meet her friends from America.

I heard the new song on the radio. I high and low in the music store, but I can’t find the song.

You can’t imagine what great difficulty we have ever had ________ with the problems.