We’ll plant trees tomorrow, and I don’t know       Tom will come and join us.
#41370
A
if
B
which
C
what
D
where
推荐题目
It was raining on the day_______ they arrived.
#69464
A
in which
B
on that
C
on which
D
where
_______in the ocean, it becomes powerless once it is on the beach. 
#69193
A
However a whale is powerful
B
However powerful a whale is
C
Whatever a powerful whale is
D
Whatever powerful a whale is