How time flies! ________ almost ten years since my friend left China to work in the USA.A. It’s B. It was C. That’s D. That was
–Excuse me, haven’t you learned the new law? Everyone in a car must wear theseat belt. -- Sorry, we won’t do that again.
Though they are far away from school, the children who live in mountains ______ go to school on foot.
--Did you go to Kenli during the Peach Blossom Festival (桃花节)? --Yes. The flowers were beautiful. Bees were flying them.
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?
Mum, I’ve got the first prize in the photo competition. _______!