The president of the university arrived yesterday, _____ the start of his short visit to China.
The clever boy made a hole in the wall, _____ he could see _____ was going on inside the house.
---Do you have anything to say for yourself?---Yes, there is one point ________ I must stick to.
The thief went into the house at midnight, only ______ by the policemen hiding there.
In spite of the great difficulties, Helen Keller ______ studying and finally succeeded.
If you ______ succeed, you will have to work hard.