17. GWD25-Q17

Until recently, the Inuit people led a nomadic existence, sheltering in

igloos, the ice-block domes that are peculiar to north-central Canada,

and in structures made of stones, bones, driftwood, and skins.

A.     Until recently, the Inuit people led a nomadic existence, sheltering

B.     During recent times, the Inuit people lead a nomadic existence,

sheltering.

C.     In the times that are recent, the Inuit people led a nomadic exis-

tence, sheltered.

D.     Up until recently, the Inuit people, leading a nomadic exis-

tence, have sheltered.

E.      Until recent times, leading a nomadic existence, the Inuit people

were sheltered.ANS：A

why A?我选了E,我怎么觉得E更好，untill recent times没有错呀，顺便问问shelter怎么翻译，似乎有很多种？