I can still remember that it is since the 1990’s, _____ we began to use cell phones,_______ the number of mobile users has greatly increased.
I have keeping the photo of my daughter _______ I can see it easily every day.
The language used in advertisements differs from ____ used in ordinary readings.
—Keep ____ in mind that you have to be home by 10 o’clock. —Ok, I will.
—Did you listen to Mr.Jackson’s lecture ? — Yes,I have never heard a _____ one.
He is a worthy leader, who never ______ his power which is given by people