The famous Mid-Autumn Festival is usually held _____ the 15th day of the 8th lunar month every single year.

A. in / B. at / C. on / D. before

Son Doong in Quang Binh province is well-known worldwide as the largest natural _____ on our entire planet.

A. cave / B. desert / C. forest / D. mountain

My best friend usually spends about two hours _____ comic books at home every evening.

A. to read / B. read / C. reading / D. reads

After walking in the cold rain during his trip to the city, Peter began to ______ a terrible flu.

A. drop out of / B. go down with / C. take off / D. look up

At the traditional food festival in our community, all the local chefs were dressed ______ white.

A. on / B. at / C. with / D. in

Many teenagers in my community adore ______ part in volunteer activities to help the elderly.

A. to take / B. taking / C. take / D. taken

People living in the countryside often have a strong sense of ______, always ready to help their neighbors in times of need.

A. community / B. entertainment / C. lifestyle / D. hobby

The local farmers in my village are very ______ and often invite visitors to share meals with their families.

A. hospital / B. hospitable / C. hospitality / D. hospitably

During rush hour, the city center always suffers from ______ traffic congestion, making it hard to commute.

A. strong / B. heavy / C. hard / D. thick

My grandmother is learning ______ to use a smartphone to keep in touch with us.

A. what / B. why / C. how / D. which