—Jane ,can you play_______ erhu .This is ______ useful book on erhu .A. the , a B. / ; a C. the ; an
--- Is the shop______ or______ now? --- Sorry, I don’t know.
Do you know the man_______ glasses?
Dad, my trousers are old. I want to buy a new ________.
Tom needs some help ________ his homework. Can you help ________?
It’s important __________.