—Is your sister _____ now?—Yes, she is. And her family members are preparing a party for her _____birthday next month.A. nineteen ; twentiethB. nineteenth ; twentyC. nineteen ; twentieth
—What are you doing,Linda?—I'm _______ doing my homework.
—Hello!____ Tom!—Hello!Tom!It’s Linda here.
—What ______ you ______?—I _______ the dishes.
—What's Mary doing?—_______.
My friend pal and I often talk _______.