---How many Chinese astronauts ______ into space since 2003?----Twelve , including two women.
-----I am going to have a test next week.-----__________!
There were _________ doctors, so Dr Norman Bethune had to work on his own.
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.