You were not in when I came over to your house-Oh, I ____________ for a friend from England at the airport

It was playing computer games _____ cost the boy plenty of time _______ he ought to have spent doing his lessons.

In the abundant content of the Poetry Garden in Tang Dynasty, the __________of window is rich and colorful, which is really a feast to the eyes of its readers.

What would you like to order, sir—Er, let me have a look at the , please.

students don’t understand what their teacher is talking about, he/she hasn’t _________his/hermeaning_____________