We should protect the earth, we will have no water to drink.
#58271
A
so
B
or
C
and
D
but
推荐题目
______ Kathy was watching TV, her mother asked her to go shopping.
#56706
A
Before
B
Until
C
While
D
After
Help others whenever you can you’ll make the world a nicer place to live.
#55388
A
and
B
but
C
or
D
unless
