—Is that your grandpa ?—Yes, although he is very old ______ he works very hard.
下列表达正确的是: . A. one bags B. three boys C. ten boy
—What’s in the bag? —There _______a pen, ten books and a dictionary. A. am B. is C. are
Mum,____is my friend , Mary.
Twenty and ____is sixty.
We are in _____.