Question

一道英语选择题，不懂啊，谁能解释一下

都是主动表被动，有什么区别啊
1The air is thin()in the high mountains.
a;to be breathed
b;to breathe
c;to breath
d;for breathe
2With so much work (),he doesnot know whether he has time to enjoy the concert.
A;to be done
B;doing
C;done
D;to do

Answer 1

c， 参考：the work is hard(for me) to do.一样的语法结构

D，have something to do,同样的语法及结构，主语是人，用主动，且作为主语不能用正常时态，不定式就可以了。

Answer 2

第二题选B 词组:with…doing sth

Answer 3

c
d

Answer 4

B
D

Answer 5

C
D