Physics is difficult ____.
— What are you doing this Saturday?— I’m not sure, but I go to the Rolling Stones concert
— It rained cats and dogs this morning. I’m glad we took an umbrella.— Yeah, we would have got wet all over if we _______.
No one _____ be more generous; he has a heart of gold.
If he had spent more time practicing speaking English before, he _____ able to speak it much better now.
--Why are your eyes so red? You _______ have slept well last night.---Yeah, I stayed up late writing a report.