1.You can't improve yourself unless you decide to work hard.You can't improve yourself _____ you _
问题描述：
1.You can't improve yourself unless you decide to work hard.You can't improve yourself _____ you _
1.You can't improve yourself unless you decide to work hard.
You can't improve yourself _____ you _____ decide to work hard.
2.He doesn't know where he should go for vacation.
He doesn't know _____ ______ ______ for vacation.
答
if don't
where to go