—Where are the Greens?—They are in Guilin ________ vacation.
---All the students in the class went to the Great Wall ________ Jack. Why? --- Because he was ill in hospital.
I found ________ difficult to make friends with him because he is very shy.
--- What happened _________ you ________ April Fool’s Day? --- I was fooled by my little brother.
--- __________ bad weather! We can’t go on a picnic. --- What about reading some interesting books at home.
Don't throw that away --- it might come in handy.