.The growing speed of a plant is influenced by a number of conditions, _______are beyond our control.
We will do it ourselves ________asking others to help.
Have you ever noticed the house, ________ windows are always closed?
I want to know when he ________ for New York tomorrow.
Even on a cold day,he prefers ________out to play football ________ at home.
It was in 1969 ______ two Americans went to the moon by spaceship.