My neighbor asked me to go for ______ walk, but I don’t think I’ve got ______ energy.
| A．a; 不填 | B．the; the | C．不填；the | D．a; the |
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 |
People try to avoid public transportation delays by using their own cars, and_____ this creates further problems.
| A．in short | B．in case | C．in doubt | D．in turn |
Scientists are convinced_____the positive effect of laughter_____physical and mental health.
| A．of; at | B．by; in | C．of; on | D．on;at |