--Peter, hurry up! You ______ on the phone.--Oh, I ______. Thank you.
The level of the river ___ 20 centimeters over the security line and ____must be taken to control the flood.
Edison asked his father why the hens could hatch eggs ___he couldn’t.
The new suspension bridge ___by the end of last month.
--How often do you attend the evening classes? ---_____, three times per week.
The sun was shining brightly, ____ everything there look more beautiful.