Before a problem can be solved, it must be obvious ________the problem itself is.(2011·湖南)
Try not to cough more than you can________since it may cause problems to your lungs.
Time is of no importance to great thoughts,________ are as fresh today as when they first passed through thinkers' minds ages ago.
Now there is just one point ________ I wish you to make quite clear.
It's helpful to put children in a situation ________ they can see themselves differently.
—What do you think of teaching,Bob? —I find it fun and challenging.It is a job ________ you are doing something serious but interesting.