1．________ the pieces of cloth with a loose stitch before finally sewing them together.
A．Join B．To join C．Joining D．Joined
2．It was unbelievable that the fans waited outside the gym for three hours just ________a look at the sports stars.
A．had B．having C．to have D．have
3. ________ of danger in the street at night, she had to go home, with a friend ________ her.
A．Warning；following B．Having warned；following
C．Having been warned；following D．Warned；followed
