I will never forget the people and places _________ we saw in Hong Kong last year．

This is a big problem, can you ________?]

Dream of the Red Chamber is _____ worth _____ because we can learn a lot about the noble families in the feudal society.

_________ you spell it ? – Yes, I can. P-E-N, pen.

If it ________ rain tomorrow, we’ll go to the zoo.