.
Why does she steal things ________ she could easily afford to buy them?
| A．when | B．where | C．unless | D．which |
About ____ gene-targeting drugs are already in testing pipeline. It won’t be long ____ they are put into effect.
| A．two dozen; before | B．two dozens; that | C．two dozens of; before | D．dozens; that |
People take naps at noon in warmer climates, ____ the heat makes work difficult in the early afternoon.
| A．which | B．what | C．where | D．when |
--- What do you think of this novel?
--- Er … sorry. I _____. What did you say?
| A．didn’t listen | B．hadn’t listened | C．haven’t listened | D．wasn’t listening |
At the conference, people of different _______ were given a chance to exchange theirs with each other.
| A．points | B．manners | C．views | D．ways |
This book tells ____ life story of John Smith, who left ____ school and worked for a newspaper at the age of 16.
| A．the；/ | B．a；the | C．the；the | D．a；/ |