It is not rare in_____ that people in ______ fifties are going to university for further education．
| A．90s ; the | B．the 90s; / | C．90s; their | D．the 90s ; their |
Be quiet _______ you should wake the baby.
| A．in case | B．so that |
| C．in order that | D．when |
Take a hat with you in case the sun is very hot.
| A．in case | B．so that |
| C．in order that | D．when |
I’ll keep his address _____ I need it.
| A．so that | B．in order that |
| C．in case | D．when |
_______ your composition carefully, some spelling mistakes can be avoided.
| A．Having checked | B．Check |
| C．If you check | D．To check |
________ more careful, the work might have been done better.
| A．Being | B．Having been |
| C．If you had been | D．To have been |