You should ________ (concentration) on the road when you're driving.
举一反三
- 中国大学MOOC: You should on the road when you’re driving.
- You should-— the road when you're driving.
- You ______ be too careful when you are driving. A: should B: needn't C: cannot D: must
- You’re driving too fast. Can you drive ______?
- You should smile when you're on the phone it's felt through the phone. A: True B: False