单选题 ________ phones are inherently insecure, as any one can listen to and
Record conversations.

单选题 South Africa was going through a period of____________change.

单选题 Your risk of developing bronchitis is greater if you work around certain lung_____________, such as grains or textiles, or are exposed to chemical fumes.

单选题 The ___________ passage is the natural conduct for directing air into the lungs during breathing at rest and is largely responsible for filtering, warming and humidifying the inspired air.

单选题 ___________ is an inflammation of the lining of your bronchial tubes,
Which carry air to and from your lungs.

单选题 The nasal cavity is divided into two sides by the nasal septum, the
Divider that creates the left and right _________________.

单选题 Chronic bronchitis, a more serious condition, is a constant __________ or inflammation of the lining of the bronchial tubes, often due to smoking.

单选题 Wear rubber gloves while chopping chillies as they can___________
The skin.