—When _________ personal computers _____________?
—In 1976.
| A．is, invented | B．did, invent |
| C．were, invented | D．was, inventing |
________ is it from your home to school? It’s about ten minutes’ walk.
A. How far
B. How much
C. How long
Mr Green _______ go to bed _______ he finished his work last night.
A. does, until
B. don’t until
C. didn’t until
The little girl felt sad ________ her pet dog died.
A. why B. because of C. because
－What’s your plan during the summer holiday?
－I want to go on a _________ visit to Beijing.
A. five-day
B. five day
C. five days
The NBA_____ in 1946. It has a history of over 60 years.
A. came from
B. came out
C. came into being