How old is your daughter — ______ . We had a special party for her _____ birthday last week.

Are there any books about writing on theshelf—There are only a few, ________.

Zhangjiajie is worth visitingI there with my parents during the holidays.—I agreeI have been there twice

____the population of Shandong Province—I can’t say exactly, but I know it ________ about 80 million.

The clever boy made a hole in the wall, _______ he could see _____ was going on inside house.