27，be in the dark 蒙在鼓里
A: Do you have any idea what his notice is about?
B: I’m as in the dark as you are.
28，be stuck 卡住了
I can’t get this window open. It’s stuck.
29, bite off more than one can chew. 贪多嚼不烂
A: I hear you’re taking an advanced physics course this semester.
B: I think I’ve bitten off more than I can chew.
30, break new ground 有了新的突破
His architectural design broke new ground in the field.
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