Scientists (a)   extraterrestrials some day.

(Fill in the blanks with may/might + verb)

The universe (a)   might have millions of galaxies.

(Fill in the blanks with may/might + verb)

There (a)   oxygen on other planets.

(Fill in the blanks with may/might + verb)

One day, you (a)   an astronaut.

(Fill in the blanks with may/might + verb)

(a)   likes to talk about alien.

(Fill in the blanks with everyone, someone, anyone, or no one)

(a)   knows for sure if there is alien or not.

(Fill in the blanks with everyone, someone, anyone, or no one)

Let's not believe (a)   if they have ever seen an alien.

(Fill in the blanks with everyone, someone, anyone, or no one)

The baby penguin is so cute, (a)   ?

(Fill in the blanks with question tag.)

The howler monkeys are loud, (a)   ?

(Fill in the blanks with question tag.)

The lion was dangerous, (a)   ?

(Fill in the blanks with question tag.)

That snake looks hungry, (a)   ?

(Fill in the blanks with question tag.)

Horses don't eat meat, (a)   ?

(Fill in the blanks with question tag.)

The frog escaped from the snake, (a)   ?

(Fill in the blanks with question tag.)

I (a)   (listen) to jazz music. It's my first time.

(Fill in the blanks with present perfect with ever/never)

This movie is new. We (a)   (watch) it before.

(Fill in the blanks with present perfect with ever/never)

She looks confident because she (a)   (perform) in public.

(Fill in the blanks with present perfect with ever/never)