What difficulty I had _____ the dirty walls! I had no choice but to have it ____ again.

Do you know the lady ____ is interviewingour headmaster—Yes, she is a journalist from CCTV.

_____ in the film The Water Margin as Song Jiang has helped actor Zhang Hang Yu gain more fans. [ ]

Now more and more people have come to know the role that trees _____in our natural environment. [ ]

gineers are so busy that they have zero time foroutdoor sports activities,___they have the interest