Most of the teenagers, especially' teenage boys, take great delight in playing games online and they say it is delight to make some new friends in this way.
| A．/；a |
| B．a；/ |
| C．the; a |
| D．a; the |
None knows if _______ that boy, but if _______ him, her parents will be disappointed.
| A．she will marry, she will marry | B．she marries, she marries |
| C．she will marry, she marries | D．she marries, she will marry |
The problem is _____ has caused us a lot of trouble.
| A．one | B．that |
| C．one that | D．that one |
He pointed to ______ looked like a tomb and said, “Ghost.”
| A．that | B．what |
| C．which | D．as |
. We are living in an age ______ many things are done on computer.
| A．which | B．that | C．whose | D．when |
After _______ had happened he could not continue to work there.
| A．which | B．how |
| C．what | D．having |