There are still many problem ahead of us, but by this time next year we can see light at the end of the ________.
Not having promoted the new digital camera successfully, the company should its original marketing methods.
So absorbed in his work ____________that not a sound ___________.
My English teacher’s humor was ____ make every student burst into laughter.
---Turn off the TV, Jack, ______ your homework now? --- Mum, just ten more minutes, please.
She kept a little notebook, in whichthe telephone numbers and email addresses of her friends.