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3. —Have you ______ been to the Great Wall
in China, Vicky?
— Of course, I have.
4. Don’t worry. We have _______ helped you sweep the classroom.
5. — Have you done your work _______?
— Sorry, but I will finish it in one hour.
just
never
ever
already
yet
have/has been have/has gone
1. A spaceship ________ to Mars. It is coming back to the earth next year.
2. Lots of astronauts __________ to the space station. They found it very interesting.
3. Some astronauts _________ to the moon twice.
4. Two British astronauts __________ to the space station. They will come back in January.
has gone
have been
have been
have gone
2.Complete the sentences with the expressions in the box.
3.选择since 或 for 填空
1. I haven’t done much exercise _____ I got my computer last year.
2. I have bought the book ____ three months ago.
3. ______ then, it has become part of my life.
4. I’ve been ill _____ about three days!
5. We have played football _____ a year now.
since
since
Since