-----I am sorry for having been so rude to you.---------That’s OK. I am sure you didn’t___________.
He was about to tell me the secret __ someone patted him on the shoulder.
He is the only one of the students who __ a winner of three years.
The scientist did __ experiments to test the new drug.
These plants are watered __ .
Guilin is __ worth __. Have you been to it?