Choose the best answer A, B, C or D to complete each of the following sentences.
Robots will replace human shop assistants _____ ten years.

More (16) _______ 1 billion people now participate in Earth Day 

Rewrite second sentences with the same meaning.

“I will hand my assignment to the teacher tomorrow.”

=> Mai said that ______________________________________________________________.

Rewrite second sentences with the same meaning.

"How often do you visit your grandparents?" Lan asked Mai.

=> Lan asked Mai ____________________________________________________________.

Rewrite second sentences with the same meaning.

I will give him your letter when I see him tomorrow.

=> As soon as _______________________________________________________________.

Rewrite second sentences with the same meaning.

These are her books.

=> These books ______________________________________________________________.

Choose the word whose underlined part is pronounced differently from that of the others.

Rewrite second sentences with the same meaning.

They were calling for help when the rescue workers appeared.

=> While ___________________________________________________________________.