Thank you for giving me a hand. I ______ in the experiment without your valuable help.

Can I help you, boy— Yes. There is ______ wrong with my bike.

It has been thirty years since I my hometown.— How time flies! Great changes in our hometown in the last thirty years.

I had been working on math for the whole afternoon and the numbersbefore my eyes

Where is your mother，Tom—She _________________the dishes in thekitchen.