It is surprising that such a young boy can swim ______ the river ______ 100 meters wide.
The police are________to conclude that the cause of fire had been a cigarette end.
I don‘ t know how to use a computer,_________.
His room needs _______,so he must have it ________.
It is in Qingdao _____ you‘ re going to pay a visit to ______this kind of washing machine is produced.
After ______silence of several minutes, he came towards her and said, “I have struggled with my feelings , but without ______success!”