I am strongly ________ keeping animals in the zoo， because I think animals should also have the right to enjoy freedom.

The building project ______ next year is, I think, not easy ______ in time. [ ]

from the top of the tower ,the south foot of the mountain is a sea of trees

ugh his classmates are all ahead ofhim, he is studying very hard to _____ them

对下面两句话的意思，理解全部正确的一项是（ ）①青，取之于蓝，而青于蓝 ②求其所以为舜者