Whether the children have______fun in school has become________public concern．
| A．/;a | B．/；/ | C．the；the | D．the；a |
.
__ from the motherland for about a century, Hong Kong returned to China in 1997.
| A．Being separated | B．Having separated | C．Having been separated | D．to be separated |
.
Gun control is a subject _____ Americans have argued for a long time.
| A．of which | B．with which | C．about which | D．into which |
.
With a basket on her back, the little girl is walking along the stream with green grass and red flowers ____ on both sides.
| A．to grow | B．grown | C．growing | D．being grown |
.
As Christmas draws near, they feel more and more uneasy with their stored money ____.
| A．to be run out | B．to run out of | C．being run out | D．running out |
.
— When did they come back last night?
— It was midnight ____ all of us were sleeping.
| A．that | B．when | C．which | D．in which |