Please post this to us if you want to _________.
Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent children from playing with fire.
—Thank you very much. —It’s a piece of cake compared to your saving my life: I am forever ______.
—Why are you so disappointed? —I went there hurriedly and waited there for 3 hours, ______ the tickets have been sold out.
—What are you doing outside the class? Didn’t you hear the clock ______? —Sorry, sir. I ______.
We have made it a rule that whoever finds that tree first can take_________ of it.