Many years of hard work_______ his great success in the development of this new type of material.
| A．due to | B．thanks to | C．contributed to | D．looked into |
相关试题
Would you like tea or coffee?
-, thank you. I've just had some water.
| A． | Either | B． | Both | C． | Any | D． | Neither |
The exam results will be on Friday afternoon.
| A．put down | B．put off | C．put up | D．put away |
No matter how, it is not necessarily lifeless.
| A．a desert may be dry | B．dry a desert may be |
| C．may a desert be dry | D．dry may a desert be |
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