She was so quiet that her ________ was hardly noticed．

A．present

B．exist

C．presence

D．existing

The doctor arrived just ________ to save the boy．

A．in time

B．on time

C．at times

D．for time

________ I've heard the music I understand why you like it．

A．So that

B．Now that

C．Now then

D．After that

________ we'll go camping tomorrow depends on the weather．

A．If

B．Whether

C．That

D．Where

________ she couldn't understand was ________ fewer and fewer students showed interest in her lessons．

A．What; why

B．That; what

C．What; because

D．Why; that

________ fashion differs from country to country may reflect the cultural differences from one aspect．

A．What

B．That

C．This

D．Which

________ made the school proud was ________ more than 90％ of the students had been admitted to key universities．

A．What; because

B．What; that

C．That; what

D．That; because

It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today．

A．that

B．when

C．what

D．how

________ I can't understand is ________ he wants to change his mind．

A．That, that

B．Which, how

C．What, what

D．What, why

________ matters little．

A．He will come or not

B．If or not he comes

C．Whether he comes or not

D．He comes or not