Как выполнить задание по английскому?

Dr Kevin Lacey is a psyhologist who specialises in body language-that is,the way people unconsiously reveal theit thoughts and feeling simply by (16)... way they sit,stand or move their arms. Nowadays Dr laceys says,more and (17)... people recognise that,in order to make a good impression,saying the right things isn'tenought. (18).. we say it,and the body language we use,(19)...be just as important.So what does he suggest we do to improve the sort of message our body language is sending?Firstly,don't cross your arms or legs,he advise,and (20)... you are wearing a jacket,open it.