— We should recycle everything we can．
— Absolutely．These may seem little things，but they’re not__________it comes to saving the
environment．
| A．since | B．when | C．while | D．as |
A great man shows his greatness _________ the way he treats little men.
| A．under | B．with |
| C．on | D．by |
If you really have to leave during the meeting, you’d better leave _________ the back door.
| A．for | B．by |
| C．across | D．out |
Fred entered without knocking and, very out of breath, sank _________ a chair.
| A．on | B．off |
| C．into | D．to |
The open-air celebration has been put off __________ the bad weather.
| A．in case of | B．in spite of |
| C．instead of | D．because of |
__________ fire, all exits must be kept clear.
| A．In place of | B．Instead of |
| C．In case of | D．In spite of |