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

Only when we begin our college life______the importance of English.

Not a single word_______when _______about his late mother.

Only after__________ his work __________ to see his grandfather.

---You ought to have warned him of the danger! --- ____! But he wouldn’t listen!

______ it ______ for your help, I couldn’t have made any progress.

We laugh at jokes，but seldom____________about how they work．

Beyond the river_____.

Though_________to see us,  the professor gave us a warm welcome.

It was only when I read this story for a second time________to appreciate its beauty.

— I told him not to play football in the street.— ________. But he turned a deaf ear to me.

_____________　that I couldn’t be absorbed in the work.

Under no circumstances _____ that I would meet so many problems when I decided to take the job．

Young people tend to get up very late unless ________ to rise early.

--Why didn’t you take part in the school reunion （团聚、重聚）yesterday? --I’m sorry, but not until last night ________ of it.

. Only _____ in a foreign-funded enterprise ______ the importance of learning English well.

In no way ______leave ______ little children alone．

 __________ the mother sacrificed everything for her daughter.

Next door to ours _____, who has just retired from work.

 So _____ that modern industry cannot develop without it.