This is 3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?
Are you ______when someone looks at you in______ ?
What ways can you think of _________ out the physics problem?
I don’t know ______to do with the maths problem. It’s too hard.
—Thank you, Mille and Kitty. It was kind of you to help me with my lessons. —_______.
— ________ useful tool the computer is! — I agree. It’s ______ interesting as well.