—Shall I lock the lab now before I go home? —_____. I’ll check it myself later.
---Who is that woman? ---She is ________ mother.
When she came back from abroad, Lucy told us about the cities and the people ____ she had visited.
I am looking forward to _______ you again next month.
---When ______ again? ---When he ______, I’ll let you know.
The Yellow river is the second ______ river in china.