Where’s Wuhu?—It’s .[ ]
Tom usually _________ a bike to school. Look, he _______ to school now.
Is that your bike, in front of the black one?-No. It’s ______.
Is that Lucy’s sister, Lily?—No, it _______ be her. She has gone to English.
It is the“single certificate”, a talking card for Singles’ Day, falls on November