We should _____ our parents when they are old.
举一反三
- We must take care of our parents when they are old. ---- Our parents ______ when they are old. A: must be taken care B: must be took cars C: must take care of D: must be taken care of
- 中国大学MOOC: We should ______________ with our old classmates after we graduated.
- We ( ) our breakfast when an old man came to the door.
- When looking at our writing, we should ask ourselves
- We should show our ID card when we are checking in at the departure lounge.