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Small. moments sometimes ______a very long time.A. keepB. haveC. lastD. go
By the time you arrive, I ______ working for two hoursA. will beB. canC. will have beenD. have been
What will scientists do to make sure the poison works this time?A. They will try some of it themselves.B. They will use a special kind of poison.C. T
The officer allowed ______.A. the students to fly the plane all the timeB. all students to fly the planeC. the students who were not frightened to fl