It’s said that scientists have ________ a way to deal with the serious disease

Tom’s uncle has devoted _________ to charity since he came to China 20 years ago.

Mom, I’m old enough to wash ________ own clothes and ________. You can have a rest after work.

Put the science books _____the box and take them_____ the classroom.[ ]

Tony has rice with hamburgers ______ his lunch?[ ]