He always dreams of ________ a chance for him to bring into full play his potential.

Taiyuan，a city in North China，was struck by a heavy snowfall last week，________serious traffic problems.

Some students came to Xiushui No.1 Middle School this year, and left their parents, _____ to return home until he achieves his goal.

________ to sunlight for too much time will do harm to one's skin.

________ in a long queue, we waited for the store to open to buy a New iPad .