The scientist became convinced that life exists on Mars while___the stone.A.studying B.studyed

相关推荐

• The scientist became convinced that life exists on Mars while___the stone.
• The scientist became convinced that life exists on Mars while___the stone.A.studying B.studyed
• Without sunlight ,or water or air ,there ___ no life on the earth .A should be B would be请问AB两个选项有何区别?would/should/might/could +do表示对现在的虚拟.请问在would+do和should+do同时出现时改选那个呢?
• Most scientists believe that there is no life on Mars as c____ there are very harsh