Why do you look worried?— Because what I am really concerned about is _____my friend can do me a favor or not.

We screamed and laugh _______ the whole trip.

It is reported that more schools inNanjing next year.

One year has four seasons and it_____ twelve months

Frank, what do you usually do at the weather station?—Itemperatures at 8 and 12 o’clock every day in the notebook.