【C8】A．have keptB．had keptC．have been keepingD．had been keeping

There are various kinds of metals, each （) its own properties .A、hasB、hadC、to haveD、hav

可以通过消化道传播的病毒是A.HAV与HBVB.HBV与HEVC.HCV与HBVD.HDV与HAVE.HEV与HAV

可以通过血液和母婴传播的病毒是A.HAV与HBVB.HBV与HEVC.HCV与HBVD.HDV与HAVE.HEV与HAV

This is the first time the students ______ to Hyde Park.A、have beenB、have been goneC、hav

【C8】A．had expectedB．expectC．expectedD．have expected

If her marriage had not cut short her college education she _____ a teacher.A:would hav