Human life is everywhere a ______ in which much is to be endured and little to be enjoyed.
It took the scientists seven days to________Takla Makan________“the sea of death”.
—Where did ________traffic accident happen,sir? —It took place at ________crossroads by the bank.
__________ the text a second time,the meaning will become clearer to you.
Information technology is taught in most schools,__________we have entered the information society.
Scientists say it may be five or six years __________it is possible to test this medicine on human patients.