From the space, the astronaut can see more than 70 percent of the earth _____ by water. [ ]

A. are covered

B. is covered

C. covering

D. cover

在填制入境货物报检单时，如果合同、发票中所列的币种不是美元，申请人可以将货值换算成美元，也可以直接填制合同、发票中所列的货值和币种。 ( )