--- I can’t go for a picnic with you because something urgent has _____. ---What a shame!
I don’t think she saw me just now. She_________ the beautiful vases.
Helen said she would come to my birthday party, but she hasn’t yet.
____some doubt among scientists about the cause of cancer.
---Try not to work yourself too hard. Take it easy. --- Thanks. _________
The Harry Potter books are quite popular; they are in greatin this city.