x－0.6=1
x=____
My host family tried to cook ___________ for me when I studied in New Zealand.
--What's wrong with you , Eric ? You look tired . --I ______ to prepare for the final exam last night .
在经纬网中有两条经线和一条纬线是不用标注东西经或者南北纬它们是（ ）
①0°经线 ②0°纬线 ③180°经线 ④20°经线．
