Most people will gradually gain confidence as they________life.
A．get through B．look through
C．break through D．go through
It is requested that the machine be operated according to the________．
A．introductions B．explanations
C．suggestions D．instructions
－Mary，could you please post the letter for me while you are out?
－________
A．I'd rather you didn't. B．It's OK with me.
C．What for? D．By all means.
Tom's first job was at a local restaurant in his early twenties，________he worked for seven years.
A．where B．when
C．which D．that
She felt ________ awkward because of her bad performance on the stage.
A．extremely B．actually
C．frequently D．exactly
More and more carbon dioxide is being released into the air，________the more severe global warming effects.
A．contributed to B．to contribute to
C．contributing to D．to be contributed to
