You’d better take something to read when you go to see the doctor __________ you have to wait.
| A．even if | B．as if |
| C．in case | D．in order that |
Have you ever dreamed of playing in front of thousands of people at a concert, _______everyone is clapping and appreciating your music?
| A．in which | B．for which | C．from which | D．at which |
Sometimes they may play to passers-by in the street or subway so that they can earn some______ money for themselves or to pay for their instruments.
| A．certain | B．extra | C．various | D．unusual |