---What do you think of the twin sisters?---They are quite different. One is outgoing, __________ is very serious.
I ______ a boy. My name ______ Tom.
—______ your card number? —It’s 15.
—Hello! ______—Hello! I’m Jack!
There is ________ “u” in the word (单词) ”quilt”. A. / B. a C. an the
—________ his telephone number? —_________.