Ⅰ.单句语法填空
1．Had she lived up to her promise，she would have made it to Yale University.
2．They tried all means, which possibly are (be) helpful，but unfortunately not a means has_worked (work) so far.
3．I wish to be considered as an applicant (apply) for the position.
4．Onethird of the country is_covered (cover) with trees and the majority of the citizens are (be) black people.
5．It is honorable to make a life with your hands while depending on others is a shame.
6．He had been calling for a common European policy on immigration (immigrate) to England.
7．To make this distinction (distinct) clear, we shall have to look closely into the long history of biology.
