. A: Whose shirt is this? Is it Tom’s? B: No, it isn’t. ______________ is white.
My little brother caught a cold, ________ he didn’t wear warm clothes yesterday.
I couldn’t work out this problem ________ my teacher helped me.
_________ my mother was washing clothes, my father was reading books.
When the first ______ came to the US, they were hungry as they have nothing to eat.
Spring is the best _______ of the year, because we can see lots of beautiful flowers.