-- How about going shopping on Renmin Road this evening?--- ______,but I have to prepare for tomorrow’s exam.
There are apples in the basket, but there aren't oranges.
Mary and I _________ friends.
There _______ a pen and some pencils on the desk.
.--- Is your sister a factory worker or a doctor? --- ________________.
--------- Where are my pens? --------- _________________.