Sure, here are five questions for a high school English proficiency test:

1. Read the following passage and choose the best answer to the question.

"The impact of social media on teenagers has been a topic of much debate in recent years. While social media has many benefits, such as connecting people from all over the world and providing a platform for self-expression, it also has its drawbacks. For example, excessive social media use has been linked to decreased attention span, increased stress, and decreased face-to-face communication skills. In addition, cyberbullying and online harassment have become serious concerns.

What can be inferred about the attitude of the author towards social media and teenagers?

A) The author is strongly against social media and believes it has no benefits for teenagers.
B) The author is neutral and presents a balanced view of the impact of social media on teenagers.
C) The author is supportive of social media and believes it has many benefits for teenagers.
D) The author is unsure about the impact of social media on teenagers and is still forming an opinion.

2. Choose the correct form of the verb in parentheses to complete the sentence.

"By the time I (finish) my homework, it was already midnight."

A) finished
B) finish
C) finishing
D) will finish

3. Select the correct answer to complete the dialogue.

A: "I'm thinking about taking a gap year after high school. What do you think?"
B: "I think it's a good idea. You can use the time to travel, work, and gain some real-world experience before deciding what you want to study in college."

What is B's opinion on taking a gap year?

A) B is against the idea of taking a gap year.
B) B thinks it's a good idea.
C) B is unsure about the idea of taking a gap year.
D) B thinks it's a bad idea.

4. Fill in the blank with the correct form of the word in parentheses.

"My parents are very ______________ of my decision to pursue a career in the arts."

A) support
B) supporting
C) supportive
D) supports

5. Choose the correct answer to complete the sentence.

"I'm not sure if I'll be able to attend the party tonight, I have a lot of ______________ to finish."

A) homework
B) works
C) work
D) working

I hope these questions help you create a useful English proficiency test for your high school students!