He ______ be sitting at the gate, waitin
题型:选择题
问题:
He ______ be sitting at the gate, waiting for his lost son.
A.used to
B.was used to
C.could
D.was accustomed
He ______ be sitting at the gate, waiting for his lost son.
A.used to
B.was used to
C.could
D.was accustomed