The condition prevents the blood from freely.
—How about going out for a picnic on Sunday morning?—Hmm, ____.The weather is quite warm these days.
The driver ____ have drunk a lot before the accident, but I'm not quite sure of that.
When ____ to compare the education system of China and Britain, the professor gave no answer.
Why not get some work experience first ______ go straight on to university?
What if we meet with a situation _______ none of us are able to deal with?