She ____ football yesterday.
A:playing
B:played
C:plays.
设P=1log211+1log311+1log411+1log511则( )
“雅丹“源于维吾尔语,意指具有陡壁的小山.在地质学上,雅丹地貌专指经长期外力作用形成的一系列平行的垄脊和沟槽构成的景观.读雅丹景观图,完成下题:
----He ___________ for nearly twenty years.