We understand _______small changes to our land can have a big impact upon our environment __________ as we know is vulnerable enough.
| A．what; which | B．what; where | C．how; where | D．how; which |
____ apple fell from the tree and hit him on ___ head.
| A．An; his | B．The; the | C．An; the | D．The; / |
Jane ______ a cold and was absent from school yesterday.
| A．came down with | B．rose up against |
| C．took control of | D．stood in the path of |
Animals suffered at the hands of Man ______ their homes were destroyed by people to make way for agricultural need to provide food for more people.
| A．in which | B．for which | C．so that | D．in that |
His actions could lead to him ______ his job.
| A．lose | B．losing | C．to lose | D．being lost |
She devoted herself ______ to her research and it earned her a good reputation in her field.
| A．strongly | B．extremely | C．entirely | D．freely |