H．S编码制度是将所有国际贸易商品按贸易部门分为21类（)A．正确B．错误

According to Paragraph 3, what was partially responsible for the algae's rapid expansion in the 1990s？
A．The species' ability to reproduce rapidly in warm tropical waters.
B．The transportation of cargo between Monaco and other Mediterranean countries.
C．The development of new strains of the algae in California and Australia.
D．The failure of Mediterranean authorities to act decisively.

According to Paragraph 4, Caulerpa taxifolia is known as "killer algae" because
A．it has colonized a variety of underwater environments.
B．it eliminates native plants and drives away native animals.
C．it is toxic to people who come into contact with it.
D．it grows too deep for other species to reach it.

The word them in the passage refers to
A．sea slugs.
B．discouraging results.
C．algae blades.
D．new colonies.

If you notice the device emitting smoke or sparks, __ it off immediately.
A．turn
B．turns
C．turning
D．to turn

If you come across any errors in the article during proofreading, please report __ to the managing editor.
A．it
B．itself
C．them
D．themselves

Out of courtesy to other kitchen users, all items must be cleaned __ after use.
A．thorough
B．more thorough
C．thoroughly
D．thoroughness

The company's new headquarters office based at Canary Wharf is __ larger than the old one.
A．considerably
B．notoriously
C．additionally
D．optionally

听力原文 Attention employees. Employee parking is permitted on the second and third levels of the parking garage. You must have a parking sticker clearly displayed on the front left windshield of your car in order to park there. Parking stickers are available free of charge from the security office upon presentation of your employee identification card. Cars without parking stickers or with improperly displayed stickers will be ticketed and towed. Please take note of the following: the yellow spaces near the door are reserved for management, and the blue spaces are for all other employees. The red spaces are reserved for maintenance vehicles. Employees or visitors parking in the red spaces with or without parking stickers will have their cars ticketed and towed.
How many levels are reserved for employee parking？
A．One.
B．Two.
C．Three.
D．Four.