Gerund and infinitive

I enjoy …………………..(observe) wildlife.

He seemed ......................... (be) very upset.

What would you like .......................(do) in Spain?

We finally decided ...................(visit) them.

He'd rather .............. (not play) football today.

It appers .................. (be) a very rare type of fly.

He'd better .................... (leave) now.

She didn't know how ................ (make) that device work.

..........................(Spot) insects became very popular.

I forgot ............. (take) my camera with me, so I couldn't take any photos.

Are you good at ......................(write) essays?

They aren't supposed ...............(use) that book.

The experiment involves ......................(plan) and ............... (make) a draft.

My sister may ..................(help) us tomorrow.

I look forward to ............... (meet) you next week.

I prefer .....................(make) models to ..................(play) chess.

He appears ........................ (have) a lot of experience working in a lab.

Who encouraged you ......................(pass) that exam?