The scientists ________ on the new medicine for two years. They will succeed in no time. A．..
Thescientists________onthenewmedicinefortwoyears.Theywillsucceedinnotime.A．workB．arew...
The scientists ________ on the new medicine for two years. They will succeed in no time. A．work B．are working C．have worked D．will work
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| C |
| 试题分析: 句意：科学家们已经研制这个新药两年了，他们马上就要成功了。 in no time马上；根据for two years两年，可知时态为现在完成时，故选C. |
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