Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

1. The students are supposed to describe the ______ that they find most useful for learning English.

2. Anna joined the green movement, ______?

3. Some newspaper stories may not ______ true, but generally journalists go to great lengths to check their facts and ensure their stories are accurate.

4. The 31st SEA Games will be held ______ Hanoi, Vietnam from May 12 to 23, 2022.

5. Despite how troublesome they could be, my uncle's always had a ______ spot for his children.

6. The two men caught the virus _______ they were injected with the latest vaccine.