跟踪练习
Fill in the blanks:
• Have/has been have/ has gone
1.A spacecraft ________ to Mars. It’s coming back to Earth next year.
2.Lots of astronauts ___________ to the space station. They found it very interesting.
3.Some American astronauts ________ to the moon several times.
4.A British astronaut ________ to the space station. He’ll come back in January.
四、课堂检测
1.Linda has been to the museum three times (划线提问)
2.Linda goes to the museum three times a week.(划线提问)
