---- “Haveyou seen _____ pen? I left it here this morning.” ----- “Is it _____ black one? I think I saw it somewhere.”
I would appreciate _____ it a secret.
His plan was such a good one _____ we all agreed to accept it.
Most people admit _____ the fact that it is not easy _____ into a famous university.
You ought to be stricter _____ your son; it’s no use only being strict _____ his work.
Teachers should _____ on their students the value of hard work.