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opened; to close open; to close open; closing opening; closing
had I got， when I had got， than had I got， than did I get， when
has left left had left was leaving
I hear. – Oh.I wonder when he ___________.A. left leaves has left was leaving
STA、WL、BL STA WL和BL STA和BL
has left was leaving left leaves
I left the office did I leave the office left I the office I did leave the office
have I; when had I; when have I; than had I; than
The Brown’s Brown’s The Browns Browns
leave would leave have left had left
that; hit when; occurred to while; struck when; occurred
has left left had left have left
having taken to be taken being taken to take
left would have left had left was leaving
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