Cloning technology can human life by creating human organs to replace those which fail to function.
| A．adjust | B．substitute | C．extend | D．Transform |
相关试题
. Some birds fly_______________in winter and some stay in the north.
| A．south | B．the south | C．in the south | D．to south |
The book,_______________as a surprise for his sister was lost in the mail.
| A．intended | B．to be intended | C．Intending | D．being intended |
Between the two roads_________ a TV tower called“Skyscraper Tower”.
| A．stands | B．standing | C．which stands | D．stand |
______
__________ surprised us very much that Tom should have left without a word.
| A．He | B．It | C．This | D．That |
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