If you really have to leave during the meeting, you’d better leave ____ the back door.
A. for B. by C. across D. out
If you really have to leave during the meeting, you’d better leave ____ the back door.
A. for B. by C. across D. out
B
考出介词by表示“通过”，for 表示“目的”，across 表示“横穿”，out 表示“在外面”。