—You look so happy . Any good news ?
—Yes . ________ I walked out of our school , I met an old friend .
| A．As | B．While |
| C．Since | D．Until |
---He is an honest person ， so what he said is _______.
A， knowledgeable B， valuable
C， comfortable D， believable
______ it is raining hard ， they are still working in the field.
| A．Because | B．As soon as |
| C．Though | D．Unless |
The houses in big cities are so expensive that I can’t __________ to buy one .
| A．afford | B．choose | C．decide | D．Give |
.A smile costs _________， but gives so much. So we should learn to smile.
A. something B. anything
. nothing D. Everything
--- Is your teacher friendly ______you? --- Yes， he is very good ______us.
A. to， to B. with ， with C. to， with