There is so much noise in the next room. I wonder _______.
A.what are they doing B.what were they doing
C.what they are doing D.what they were doing
It’s hard for us to say goodbye we have so many happy days to remember.
A.so B.because C.although D.until
Mr. Black walked around and offered help ________ we were doing an experiment.
A.although B.when C.until D.unless
He kept going on his trip ________ he was very hungry and thirsty in the desert.
A.although B.whether C.unless D.as
I didn't know the news ________ you told me. Thank you for telling me that.
A.because B.though C.until D.while
My father was preparing for his speech __ my mother was doing some washing last night.
A.if B.while C.unless D.until
