We——last night, but we went to the concert instead A must have studied B might study C should have studied D would study
The teacher was___ a very old man, but in fact he was only a little over fifty.
The dead dog still______ where I____it a moment ago.
He was doing much phsical exercise to build up his______.
Every one of_____ Peace Club is required to get_____better understanding of their system.
He was busy last night, otherwise he ______ to the meeting.