who can help me solve the problems?
1.It's widely accepted that yong babies learn to do things because certain acts lead to _____.A要解析）
A.rewards B.prizes C.awards D.results
2.In face of __,it's the most important to keep up__good state of mind .b,我觉得是A.解析)
A/,a B.a,/ C.the ./ D./,the
3.this book tells __life od story of John Smith ,who left __school and worked at the age of 16.C,解析）
A.the,the B.a,the C.a,/ D a ,/
4.Beyond ___stars,the astronaut saw nothing but __spacr.(A)
A.the,/ B./,the C./,/ Dthe ,the