1.The student are _____ young people between the age of sixt

1.The student are _____ young people between the age of sixteen and twenty.
A.most B.almost C.mostly D.at most
2.The test was very hard.The students found ____hard to finish it.
A.that B.this C.it D.that it's
3.I hope _______about ancient China.
A.my son to learn much more
B.to learn many more
C.learning more much
D.to learn much more
依据哪个知识点选这个答案..其他的为什么不对!