To help readers understand how climate can change, the writer uses _________.

Neither Bill nor his parents（ ）at home.

As population increases, （ ）.

Nobody was （ ） in the office when the manager suddenly had a heart attack.

His () of the aeroplane was correct in every detail and could really fly.

I want to buy a new tie to （ ） my brown suit.

I’m fully （ ） of the consequences of what I’ve said.

I recognized John （ ） he entered the room.

（ ） I admire David as a poet, I do not like him as a man.

This project is said （ ） right now and so far everything is going on quite smoothly.

A beam of light will not bend round the corners unless () to do so with the help of a reflecting device.

The degree （ ） you maintain your mental health may depend on certain simple environmental factors.