If you travel to Mexico, you should try the ________ food. Tacos are my favorite dish.

• local

• dangerous

• ancient

• safe

Travelling alone can be ______. You should invite a friend to come with you.

• flexible

• dangerous

• enjoyable

• safe

I don't want to stay in this hotel room. I found a(n) ______ in bed.

• pollution

• insect

• tourist

• volunteer

Buses, cars, and trucks cause air _______.

• pollution

• population

• average

• solution

The strong wind caused the windows to ______.

• lead

• repair

• shake

• prepare

Please don't walk in the garden. It will ______ the flowers.

• control

• reduce

• shake

• destroy

The ______ stopped to take a photo of the Eiffel Tower.

• solution

• florist

• tourist

• pollution

After university, Ahmad will _____ for one year to help poor people.

• improve

• volunteer

• discover

• shake

We really enjoyed our trip to Europe. We saw lots of ______ towns and took some great pictures.

• pretty

• dangerous

• several

• creative

China has the largest _______ of all the world's countries. It's around 1.4 billion.

• population

• pollution

• benefit

• attitude