When we got back from the cinema,we found the lamp__________but the door __________.
She's aiming ________ a scholarship. That is why she has been focusing her mind ________ her work.
Once you ______ the habit of smoking, it is hard to quit.
It's high time that you ________ even harder at your lessons as the exam is around the corner.
The center, dealing with children_______ to computer games, has achieved great success.
—How I wish I had studied harder when I was in senior school! —If you had,you ________ a university student now.