All of us find ________ necessary to take exercise every day.
#55752
A
this
B
that.
C
them.
D
it
推荐题目
-- Did you read a book about customs last week?-- Yes, I found ______ very useful to know the customs of foreign countries.
#55792
A
that
B
this
C
it’s
D
it
Scientists are working hard to make _______ possible for people to live on Mars in the future.
#55873
A
it
B
that
C
this
D
one