I don’t know ________.A. where is Jim B. where does Jim come from C. how old Jim is
—Where are the Greens? —They are in Guilin ________ vacation.
Don’t look out, please look ________ me.
The weather is very cold, but everyone ________ having a good time.
In summer, the weather in Jinan is ________ hot.
All the students are cleaning. ________ are cleaning the floor, and ________ are cleaning the desks.