________ we admit that there are still some problems about the system of modern education,we don’t mean that it is of no use.
Do you think the concert last weekend was of __________?
The girl asked, "Could you help me solve the math problem?" "Of course, I can." he replied __________.
It was __________ computer games that cost the boy a lot of time __________ he ought to have spent onhis lessons.
Only in this way __________ to make improvements.
In order to find __________ better job, he decided to study __________ second foreign language.