单项选择题
A．All the passengers were killed. B．The plane crashed in the night. C．No more survivors have been found. D．It’s too late to search for survivors.
A．Only breakfast. B．Only lunch. C．Only night-meals. D．All of the above.
A．To increase product sales. B．To make a product much better. C．To spend more money. D．To reduce the production.