Though I live in the forest . I don’t feel .
After Mandela was free (自由的) in 1990, he chose to shake hands with the people ________ wanted to kill him.
— I’m sorry, sir. I can’t finish the work on time.— Never mind. ________, the work is quite difficult.
When you are swimming, ________ your ears. You can use earplugs (耳塞) to stop water getting into your ears.
Turn off the water while you ________ your teeth or washing your hands.
It ________ about eight minutes for sunlight (阳光) to travel from the sun to the earth.