I had a strong desire to reach in and play with the toy, but ________ thankfully by the shop window.
A. am held back B. held back
C. hold back D. was held back
--Did you enjoy the party?
--Yes, we___by our hosts.
A. were treated B. would be treated.
C. treated D. had treated
Albert Einstein was born in 1879. As a child, few people guessed that he a famous scientist whose theories would change the world.
A. has been B. had been
C. was going to be D. was
—Is Peter coming?
—No, he____ his mind after a phone call at the last minute.
A. changes B. changed
C. was changing D. had changed
In the last few years,China ___ great achievements in environmental protection.
A. has made B. had made
C. was making D. is making
Correct the errors in the following sentences, if .
A. not B. necessary
C. any D. ever