Definition: to be doing or planning something Level: B1
你这个周末打算做什么？
What ___are you ___up ___to this weekend?
我怀疑他们在搞恶作剧。
I suspect they ___are ___up ___to some mischief.
自从我们上次见面后，你一直在忙什么？
What ___have you ___been ___up ___to since we last met?
