Mars, the fourth planet from the Sun, ...... of sky gazers.
His eyes were ...... bad that he couldn't read the number plate of the car in front.
The more advanced the specialization in production and the more complex the economy, ……… to make any given good reach its ultimate user by using barter.
The teacher became upset when Frank started talking about a subject that was not ……… to the lecture.
..... tired Melissa is when she gets home from work, she always makes time to say goodnight to the children.
........ to move from a project manager position to a senior project manager, it may be necessary for them to complete some form of project management certification.
The problem facing most tourists is ……… among so many possibilities.
Scientists believe the first inhabitants of the Americas arrived by crossing the land bridge that connected Siberia and ......... more than 10.000 years ago.
I'd rather you ...... to her why we can't go.
Colloquialisms, ……… of informal spoken language, are often considered inappropriate for more formal writing and language.