He ______ the key, so we ______ into the office.
A．hadn’t left; can’tB．didn’t leave; couldn’t have got
C．hadn’t left; couldn’t getD．hasn’t left; couldn’t get
C
考查時態(tài)。句意：他沒有留下鑰匙，因此我們不能進入辦公室。結(jié)合語境可知前文描述的是過去已經(jīng)完成的動作，故用過去完成時態(tài)。下文為站在過去時間看不能進行的將來的動作，故用過去將來時態(tài)。選C。
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