The Rocket has been busy playing as guest ________ the last month[ ]

It was not until the scientist died________we appreciatedthe true significance of his discoveries.[ ]

How’s your new babysitter? — We ______ ask for a better one. All our kids love her so much.

________ nearly all behavior is learned behavior is a basic assumption ________ has been put forward by social scientists

The film has been well received, but____actual sales, it hasn’t been very successful.