How can he _____________ if he is not _____________？A: hear; listeningB; be listening; h

How can he () if he is not ？

A. listen; hearing

B. hear; listening

C. be listening; heard

D. be hearing; listened to

A.what

B.how

C.if

D.which

A.exclaiming

B.to exclaim

C.laugh

D.cry out

.

A.because B.as C.no matter how D.although

I wonder ____ he can get it done in such a short time.

A、when

B、how

C、where

D、where

A.What can he do

B.What does your father do

C.How old is he

A.how

B.which

C.that

D.what

How can one let bar staff know that he is waiting to be served？

A.Tap coins on the counter

B.Snap fingers

C.Hold money or an empty glass in one's hand

D.Wave