Guess what! I came across my primary school science teacher this morning, ______ I have lost touch for almost 20 years.
Although you have learned much knowledge and a lot of theories, the problem is _______ can be put into practice.
If you have the chance to take charge of the department, the first thing to do is to find out what _______ of you.
It is one thing to enjoy listening to good music, but it is _______ another to play it well yourself.
To be admitted to a key university, _______.
The job is not very profitable ________ cash, but I can get valuable experience from it.