—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
— Do you know __________ they got to know each other?
— It was last year ________ they both taught English in China.
A. when was it that; when B. when it was that; that
C. when it was that; when D. when was it that; that
It was announced that only when the terrible disease was under control _______ to return to their homes.
A. the residents would decide
B. would the residents decide
C. would the residents be decided
D. the residents would be decided
Only when _______ be possible to sign the papers.
A . does the lawyer come with it
B. the lawyer comes will it
C. has the lawyer come it will
D. the lawyer comes it will