Measures must be taken to prevent pollution ________ happily.
#91813
A
from we live
B
for us to live
C
us living
D
from our living
推荐题目
Seeing the teacher _______ the classroom, the boy pretended _______ the text.
#91774
A
walking in; to read
B
coming in; reading
C
entering; to be reading
D
entered for; to have read
The audience were ______ by his _______ performance on the stage. 
#96855
A
amazed; amazed
B
amazed; amazing
C
amazing; amazed
D
amazing; amazing