----- Is that Mr.Smith over there? ----- No, it _____ be him --- I am sure he is much taller.
I wrote him a letter to show my __________ of his thoughtfulness.
I walked up to the top of the hill with my friends,__________we enjoyed asplendid view of the lake.
You are old enough to __________ your own living.
It is obvious to the students __________ they should get well prepared for their future.
The government has taken measures to __________ the high prices of daily goodsto keep the market stable.