—Have you ever ______ the Great Wall?
—Yes, I have. I went there on our last school trip.
been to
gone to
been in
Their teachers are very ______ to them. A .difficult B. boring C. friendly
The book_____ be jim’s because his name is on it. A. cant B. must C. can’t
Look, she _____a book over there. A .is reading B .is looking C .is seeing
Why are you so happy? ----______my mother buys a new bike for me. A. So B. Because C. But
Maria is in the _____ office. A .teacher B .teachers’ C. teachers