Have a care what you say ______ you may regeret.
A.or B. and C. however but
Only when he saw the test paper himself, ______ he had failed in the exam again.
A．he believed B．he had belived C．did he believe D．had he believe
It is no good ______ the flowers to often, for a lillte water is enough for them.
A．watering B．to water C．watered D．waters
_____ into English, the sentence was found to have an entirely different word order.
A．Translating B．To translate C．Having translated D．translated
He was obliged to ______ the trade of shoemaker.
A．take on B．take in C．take up D．take down
The government of the United States began at once to investigate the case ______ a lot of students were killed.
A．that B．when C．where D．why
