Question

【题目】The teacher told me _________when I left the classroom.
A.lock the door
B.to lock the door
C.to knock at the door
D.knock at the door

Answer 1

【答案】B
【解析】told是tell的过去式，tell后面跟动词不定式作宾语补足语，构成 tell sb to do sth，句意是：老师告诉我离开教室的时候要锁门。