20.Mary had promised to give me a ticket for tomorrow.She failed,______.( )
A. | but | B. | too | C. | either | D. | though |
19.I think that's the only way we can think of ______ the math problem.( )
0 139679 139687 139693 139697 139703 139705 139709 139715 139717 139723 139729 139733 139735 139739 139745 139747 139753 139757 139759 139763 139765 139769 139771 139773 139774 139775 139777 139778 139779 139781 139783 139787 139789 139793 139795 139799 139805 139807 139813 139817 139819 139823 139829 139835 139837 139843 139847 139849 139855 139859 139865 139873 151629
A. | solve | B. | solves | C. | to solve | D. | solving |