—Dave, it’s dangerous to swim here. Look at the sign. —Oh, I _______ it. Thank you.
There is going to _______ a party in Lily’s house today.
He watches TV twice ____ three times a day.
You’d better ____ in bed. It’s bad for your eyes.
It ____ me nearly two hours to finish my homework yesterday.
When the teacher walked into the classroom, the students ____ at once.