Test preparation

______you______(ever/hear) of this person?

A team of space scientists ____to investigate the changes

So they _____(start) carrying out a series of experiments a few months ago

They _____(put) advertisements in several newspapers for volunteers yesterday.

One of the scientists that_____(be) involved in the project since it___(started) said...

Thousands of people _____(apply) when they____(see) the advertisement in the paper

The participants ____(already/be) exhausted because of all the intense medical examinations.

One of the participants in the programme _____(lie) in bed for 32 days

At first I____(find) it hard, but now I ____(become) quite used to it