77.Does ______ matter if he can’t finish the job on time?
He didn not go by bike with me.That is ______there was something wrong with his bike.A,why B,how C,because D,Whether
_____is today Britain used to be three different countries,and over many years the three countries became one.A,It B,What C,Where D,As
At that time,it seemed _____I could not think of the right word anyhow.A,even if B,in case C,as if D,in order
______is estimated that a round-trip to Mars would take more than a year.A,That B,what C,There D,It
______leaves the room last ought to turn off the lights.A,The person B,whoever C,Who D,Anyone