Scientists say it may be five or ten years ________ it is possible to test this medicine on human patients.
举一反三
- Scientists say it may be five or six years _____this medicine is tested on human beings. A: since B: efore C: afte D: when
- 智慧职教: Scientists have spent years ____into the effects of certain chemicals on the human brain with no results.
- This year's production is five times ______ it was ten years ago. A: what B: that C: than D: as
- Which of the following are not the outcomes of transportation planning? A: Plan of motorized transportation facilities in five years B: Plan of non-motorized transportation facilities in ten years C: Plan of bus lines in five years D: Plan of subway pricing in the next year
- The significance of the finding is that ______. A: people now know the number of chimpanzees is much smaller than expected B: it may make it possible for scientists to discover new ways of treating AIDS. C: it proves some deadly human diseases can also be transmitted to wild animals D: it will soon help the scientists develop a vaccine that prevents the AIDS virus