As is known to all language learners, newly learnt words will soon be forgotten unless ______ used in everyday communication.
When my sister phoned me, I could not hear clearly what she was _____.
She _____ me why she wanted to leave today.
Can you _____ to carry that heavy box by yourself?
She said she could not _____ all the information given in the broadcast.
It can take up three months to _____ a man to do this work.