I can't find my purse. I___________ it in the supermarket yesterday, but I'm not sure.
should leave
must have left
might leave
could have left
﹣﹣Are you sure you're ready for the test?
﹣﹣_________.I'm well prepared for it.( )
I'm afraid not
No problem
Hard to say
Not really
The party will be held in the garden, weather_________.
I have two elder brothers, ____ in the army for ten years.
Nothing could be done at the meeting, the chairman_____ absent.
Bats are surprisingly long-lived creatures, some ____________ a life span of around 20 years.