Scarcely _____ raining _____ the PLA fighters started on their way again.

Never _____ forget the days when _____ together with you.

Included _____.

Here _____. This is our classroom.

Only in the library _____ the book.

______, he still cannot make himself understood.

So difficult __________ it to adapt to the academic requirements of a Western university that I determined to take a preparation course. 

So serious        that all the persons on board were killed.

Only when we begin our college life______the importance of English.

Not a single word_______when _______about his late mother.