It is hard to say what kind of person he is.Sometimes he is very friendly; at other times he ___ be very cold.
Don’t _______ your breath trying to persuade them; they’ll never listen.
If you lend me a pound, it will _____ me having to go to the bank.
I missed what was happening because I wasn’t ______ very closely.
She went to the station to meet her husband, but _____ him in the crowd.
. It’s hard to rescue drowning people because they _____ so much.