World Wide Web was invented in 1991 by English scientist ,Tim Burners-lee.
— Would you like to ______ the discussion in our classroom?— I’d love to, but I’m ______ busy right now.
The ______ look on his face suggests that his ______ report failed the test.
I______in London for many years but I’ve never regretted my final decision to move back to China.
John received an invitation to dinner, and with his work ______, he gladly accepted it.
Please tell Tom not to leave the classroom unless he ______ that all the lights ______.