Tom took a taxi to the airport, only ______ his plane high up in the sky.
---Fancy meeting you here, Lucy! I never thought you visit us today.---Sorry, I forgot to tell you I was coming. I hope you don’t mind me ______.
--- Was it by cutting down unnecessary expenditure ______ Mr. Simon saved the firm?--- No, it was by improving work efficiency.
The house, ______ door often stays open until late at night, works as a home for the guards, some of ______ are from the countryside.
---What have you learned from your experience in the USA?---Well, meeting people from another culture ______ be very difficult.
. ---Have you seen ____ iphone? I left it on the desk this morning.---Is it ____ white one? I think I saw it somewhere.