高考高频词汇练习：operate

*1. Doctors had to ____ to remove the bullet.

*2. 下列选项中，与They are operating an emergency hospital.中operating的意思最接近的是？

*3. 根据提示补全下列句子：
The bus is designed to
（运行）in all weather conditions.
*4. 选词填空
The state also
请选择
the way for companies to sell or rent out
请选择
cars, and for companies to
请选择
driverless taxi services.(2018北京卷)
该州为租售无人驾驶汽车以及提供无人驾驶租车服务的公司扫清了道路。