题目

1 These scientists have made great c------ to sending up the satellites into outer space.
2 A large number of mouths must be fed in those less d----- countries.
3 That evening Beethoven played the music for the girl as well as u-----.
4 I phoned her s-----times,but i couldn't reach her

提问时间：2020-10-10

答案

1.These scientists have made great (contribution) to sending up the satellites into outer space.2.A large number of mouths must be fed in those less (developed) countries.3.That evening Beethoven play...