Would you ________ close the window? It’s very cold.
-- ______ do you exercise? --Three times a week.
Millie needs _______healthy.
There is ________ “m” and ________ “u” in the word “much”.
--- Are you willing to live on Mars(火星) one day? It must be amazing! --- It sounds exciting, but it still worries me.
---Why don’t we go out for a walk? The weather is fine and pleasant. --- Let's go.