Do you know ()they enjoy it or not?A if B whether C how D wh
Do you know ()they enjoy it or not?A if B whether C how D wh
It doesn't matter___he will come or not.A.whether B.why C.wh
Do you know _____ or not they will come to zhe party?A.if B.
Do you know whether or not it's impolite to smoke during a m
They his name.A notknow B know not C do not know D do know n
Do you know ___ tomorrow?a.whether will it rain b.if it will
I am very shy .(A.what if B.how C.if D.what)i do not know an
she is too afraid to know ___ to do.A how B what C whether D
翻译“How do you know whether your suffer from stress or not?”
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(B)classes do you have this morning?A.What B.how c.when D.wh
They asked ____ or not they could help us .A.if B.whether