1._____,itisquiteeasytodrillaholeinitwi
thlaser.
A.HardlyhadIsatdownB.AlthoughharddiamondisC.HardlyasdiamondisD.Howeverdiamondishard我选的是A
2.Theassistantgraduatestudent___checktheexercisebooks
A.helpsB.helpC.helpingD.tohelp
我选B
3.A:ItwashotyesterdayB:____
A.ItwassoB.SowasitC.SoitdidD.Soitwas我选了B