is even more important is the earth cooled down, water began to appear on its surface.
| A．When; that; when | B．What; whether; as | C．What; that; as | D．lt; whether;  as |
相关试题
Though we _________serious natural disasters, we are sure to overcome all difficulties.
| A．give away | B．affect with | C．suffer from | D．deal with |
After studying in a medical college for five years, Janeher job as a doctor
in the countryside.
| A．set out | B．took over | C．took up | D．set up |
Many kids ________ the net bar, and _____had a bad effect on their studies.
| A．are addicted to; it | B．get engaged in; which |
| C．are related to; what | D．are addicted to; which |
—How lovely these children are!
—Yeah．They______ memories of my childhood．
| A．called out | B．called for | C．called up | D．called on |
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