144. The Romans __________ a great city onthe banks of the River Seine in 1780s.

When you write to him, please _____ him.

You’ll have to book a ticket ________ if you want to see that show.[ ]

一 The woman biologist stayed in Africa studying wildlife for 13 years before she returned to her country. — Oh, dear! She _____a lot of difficulties.[ ]

He focused on his test papers,________never________the same mistakes.[ ]