—I an environmental report over the last few days, which should be submitted to the boss tomorrow.
A：wrote
B：was writing
C：had written
D：have been writing
过敏原和抗原比较的叙述中正确的是
在植物进化过程中，从原始藻类植物进化到原始种子植物,体现出生物进化的趋势是①由简单到复杂②由低等到高等③由自养到异养④由水生到陆生
