The first textbooks written for teaching English as a foreign language ____ in the 16th century.
| A．came about | B．came out | C．came along | D．came up |
It was when she was about to go to bed ______ the telephone rang.
| A．since | B．as | C．that | D．then |
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 |