________ the question of how global warming has _________, we are doing some projects at school.
| A．Exploring, come about | B．To explore, come out |
| C．Having explored, come to | D．Being explored, come over |
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—There is hardly an environment on earth
—Some specie
s of animals have not adapted successfully.
| A．to which | B．in which | C．for which | D．on which |
—How is your son in the new school?
—At first ,he felt uncomfortable, but he soon learned to .
| A．fit with | B．fit up | C．fit in | D．fit on |
The sudden of the headmaster gave the children who were talking loudly in the classroom a great surprise.
| A．entrance | B．entry | C．absence | D．trial |
To qualify yourself for this kind of new job, I recommend that you some online courses.
| A．to take | B．taking | C．take | D．would take |
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