题文
We will go for a picnic_______it is sunny tomorrow．（ ）
| A． |
when |
B． |
whether |
C． |
if |
D． |
while |
We will go for a picnic_______it is sunny tomorrow．（ ）
| A． |
when |
B． |
whether |
C． |
if |
D． |
while |
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