Bears_____ fat stores throughout the summer and fall to have energy enough to last them through their winter sleep.
| A．pack up | B．build up | C．bring up | D．take up |
Each day is a gift，and _______my eyes open，I’11 focus on the new day and all the happy memories I ’ve stored away．
| A．as well as | B．as long as | C．as much as | D．as far as |
The Chinese mainland has 157 billionaires as of 2013，_________second in the number of billionaires worldwide．
| A．having ranked | B．ranked | C．to rank | D．ranking |
Tigers in the state often compete with villagers living close to the reserves for resources, often________ direct conflict．
| A．leading to | B．relying on | C．standing for | D．consisting of |
Before selecting the curtain for your newly-decorated house，it’s important to know what colors look great _______ the wall paper．
| A．on | B．with | C．against | D．in |
___________you try to do something beyond what you have already mastered, you will never grow.
| A．Since | B．When | C．Though | D．Unless |