Hardly had I ______when the play began.
Effective measures have been taken to prevent _______pollution.
-- I’m thinking of the test tomorrow. I’m afraid I can’t pass this time. -- ______! I’m sure you’ll make it.
After that, he knew he could ________any emergency by doing what he could to the best of his ability.
For him_____ stage is just _____ means of making a living.
I can’t say which wine is best ----- it’s a(n) _______ of personal taste.