If you put your heart into it,_________ is impossible.
A.anything B.something C.everything D.Nothing
You never play the piano well _________you practice it again and again.
A.if B.since C.unless D.After
一Did you catch what our head teacher said?
一Sorry,I _________ a phone.
A.will answer B.am answering
C.have answered D.was answering
一I don't know _________ she can't go hiking with us.
一She has to do her homework.
A.when B.if C.why D.How
一_________will the fog and haze last?
一I've no idea.there is no sign of an end.
A.How soon B.How far C.How long D.How often
My little cousin is a(an) _________ boy and he always asks me all kinds of strange questions.
A.creative B.serious C.patient D.Helpful