__________for the bus, I heard a noise,
| A．While waiting | B．While I waiting | C．I was waiting | D．Waited |
—How amazing it is that astronauts are exploring outer space!
—It's a challenge, I guess, ______ man against nature.
| A．of | B．for |
| C．by | D．about |
Everybody was touched ______ words after they heard her moving story.
| A．beyond | B．without |
| C．of | D．in |
A great person is always putting others' interests ______ his own.
| A．below | B．above |
| C．in | D．on |
It saves time in the kitchen to have things you use a lot ______ easy reach.
| A．near | B．upon |
| C．within | D．around |
Children need friends ______ their own age to play with.
| A．of | B．for |
| C．in | D．at |