When enough years _____ to enable us to look back, we sometimes discussed the events leading to his accident.
A.went by B.were to go by C.had gone by D.goes by
New energy-sharing projects _____ in dozens of cities across the country to fuel China’s sharing economy in the next few years.
A.are to carry out B.are being carried out
C.were carried out D.will have been carried out
Unfortunately, when I dropped in, Mr. Smith __________. So we only had time for a few words.
A.has just left B.was just leaving C.had just left D.just left
—Where is your new home now?
—In the new developed zone. But I ______ downtown for five years.
A.have lived B.had lived C.was living D.lived
（2018·江苏）By boat is the only way to get here, which is _______ we arrived.
A.where B.when
C.why D.how
—Chinese women's volleyball team proves that with hardships ______great success.
—Absolutely! Opportunities favor the prepared mind.
A.comes B.is coming C.will come D.are coming
