I have some information about the astronauts _______ is helpful to you.

service ads, also PSAs, often _________ for free, _________ to educate people about health, safety or any other problem that affects public welfare

Joining the company as a clerk (职员), he got rapid promotion (晋升), and ______ working as a manager.

We met an old friend in New York ________our expectationShe waved at us ________ the street when she saw us[ ]

John is very ________ if he promises to do something he’ll do it.[ ]