He is famous _____the field of biology, but he is more known _____an environmentalist..
#25895
A
for, for
B
in, for
C
in, as
D
in, as
推荐题目
The Great Wall travels______ deep valleys, _____ deserts and______ mountains.
#26210
A
over; across; through
B
through; across; over
C
across; over; through
D
through; across; across
I’m ____your class today so you must do ____ I tell you. 
#27611
A
in charge of; as
B
instead of; what
C
in the form of; like
D
looking at; as