5、helate18thcentury____________________JamesCookcrosstheAntarcticCircle,butheneversawland.直到18世纪末,英国探险家詹姆斯·库克才穿越了南极圈,但他却从未发现任何陆地。Ⅳ.单元语法Reviewofsubjects;Reviewofverbs1 state n.州,国家,政府;状态,状况;情况,情形vt.(toexpresssth.inspokenorwrittenwords,espcarefully,fullyandclearly)陈述或说明(某事)(尤指仔细、详尽而明确地)(1)ina