The conventional view that the Mars’ atmosphere is very poor because the planet lacks a magnetic field.
. ________ his failure lies is expected ________ clear to us.
. It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.
主从复合句名词性从句:主语、表语、宾语与同位语从句及其连接代词、连词与副词. It didn’t surprise us at all ________ he was post to Hong Kong.
. – Do you have a mobile phone? – Yes, ________.
简单句:陈述句、疑问句、祈使句、感叹句与并列结构、并列句与并列连词及常用与特殊句型、语序. Tim seldom failed in his exam, ________?