HSA_Lesson 13

Don't touch the ________ inside the cave; they take centuries to form.

• fossils

• rocks

• stalactites

• crystals

I add rare stones to my ________ every time I visit a new place.

• rock collection

• photo album

• backpack

• mineral bag

We should use ________ bags instead of plastic ones.

• colorful

• reusable

• eco-friendly

• traditional

This summer, we'll have the chance to ________ a rainforest in the South.

• export

• explore

• explode

• expand

I'm ________ of snakes, so I didn't join the jungle trek.

• afraid

• aware

• fond

• shy

I ________ not to tell anyone your secret.

• remind

• expect

• promise

• admit

Please don't ________ in the national park.

• dig soil

• throw waste

• leave litter

• eat food

Try to reduce plastic ________ when you buy snacks.

• wrappers

• covers

• bags

• packaging

The museum trip was both fun and an ________.

• educational experience

• outdoor game

• official visit

• exciting event

I always ________ the night before a trip to avoid rushing in the morning.

• unpack

• fold

• iron

• pack