They are still very cautious about ______ side effect the new medicine will bring about, although the experts have tried it on about 2,000 patients.
It was not until _______ that _______ to prepare his lessons.
In the summer months the difference in temperature between the south and the north can be ________ twenty degrees!
________ I’m concerned, they have no way of keeping away from the danger.
—I find it astonishing that John ________ be so rude to me. —Not astonishing at all. He is always rude to others.
Why not get some work experience first _______ go straight on to university?