15. When Madam Curie did the experiment again, she was more careful where she _____ a mistake.
“I _____ his telephone number.” “I have his number, but I ____ to bring my phone book.”
— Did you happen to see _______ black and _______ white cat? — Are they missing? I told you to take care of them.
________ England of those years was _______ England in peace.
The cakes are delicious. I’d like to have _______ third one as _______ second one I ate was too small.
Many people agree that ______ knowledge of English is a must in _______ international trade today.