5. __________ pollution can cause hearing loss.
C. Noise

Noise pollution is a common cause of hearing loss due to prolonged exposure to loud sounds.

6. We should use reusable shopping bags __________ plastic bags.
A. instead of

The correct phrase is "instead of," meaning in place of or as a substitute for plastic bags.

VI. Choose the correct answers to complete the passage:

1. The Ha Long Bay is (1) B. located in Quang Ninh Province in Vietnam.

   • "Located" is the correct verb to indicate where Ha Long Bay is situated.

2. The name of the bay is roughly translated to descending dragon in Vietnamese. The bay is a UNESCO World Heritage (2) D. Site and is lined by over 1600 limestone islands and islets.

   • "Site" refers to a designated place of cultural or natural significance, such as a World Heritage site.

3. Legend has it that, when the Vietnamese were protecting their territory (3) A. from invaders, they offered prayers to their gods who then sent dragons as (4) D. Which the place.

   • "From" is used to indicate the source of the threat (the invaders), and "which" correctly introduces a relative clause to describe the dragons’ role in defending the bay.

4. (5) D. Most the invaders were approaching via sea, the dragons spat out jewels creating islands that lined the bay and obstructed the ships and boats of the invaders.

   • "Most" refers to the greatest number or amount, which fits here.

5. Ha Long Bay is one of the (5) D. most popular tourist destinations and is visited by hundreds of thousands of tourists each year.

   • "Most" is used to describe the superlative degree of popularity, fitting the context.

6. You can opt for a (6) B. boat cruise, that will take you as close to a lot of these islets.

   • "Boat" fits the context as it refers to a type of cruise on water.

VI/ Rewrite these following sentences:

1. It's not good to spend a lot of time watching TV.
   You shouldn't spend a lot of time watching TV.

2. A bicycle is more convenient than a car in towns.
   A car is less convenient than a bicycle in towns.

3. How much is that pen?
   How much does that pen cost?

4. Let's have a picnic in the park on the weekend.
   Why don't we have a picnic in the park on the weekend?

5. It's a good for you to take exercise every day.
   You should take exercise every day.