We have been excavating layers of ash almost six metres thick, which suggests that they the fire burning all winter.
A.should keep | B.might have kept | C.should have kept | D.might keep |
推荐试卷
We have been excavating layers of ash almost six metres thick, which suggests that they the fire burning all winter.
A.should keep | B.might have kept | C.should have kept | D.might keep |
试题篮
()