( ) is it that metals plays such an important part in our daily life?Awhy Bwhat Cwhere Dwhen.为什么?为什么选A?C或者D?那如果说金属什么时候开始在我们生活占有重要的作用?
问题描述:
( ) is it that metals plays such an important part in our daily life?Awhy Bwhat Cwhere Dwhen.为什么?
为什么选A?C或者D?那如果说金属什么时候开始在我们生活占有重要的作用?
答
后面的is is that是强调句型的标志,把它去掉,就变成metals plays such an important part in our daily life,你再看该填哪个,只有A意思对的
你要问什么时候时态就要用过去式了