—_____ my daughter is only ten years old, she knows a lot.—What a clever girl!
---Mr. Wang, I have trouble _____ the text. ---Remember _____ it three times at least.
---Does Ted tell you _____ he will come next week? ---No, he doesn’t. But _____ he comes, I’ll give you a ring.
---Where is Jane? --- I think _____ she is in the library. She wants to borrow a book about Chinese food.
--- Oh, my God! My bike doesn’t work. --- Let’s _____ our parents.
It took us _______ to finish the new research project.