25. The train leaves at 6:00 p.m., so I have to be at the station ____ 5:40 p.m. at the least.
If you really have to leave during the meeting, you’d better leave ____ the back door.
Fred entered without knocking and, very out of breath, sank _______ a chair.
He found it increasingly difficult to read, ______ his eyesight was beginning to fail. A. though B. for C. but D so
-Do you have a minute? I’ve got something to tell you. -Ok, ______ you make it short.
Everybody was touched _____ words after they heard her moving story.