— Why do you think I am not popular among my classmates?

— Maybe you don't talk about topics that interest them,________ everything you say is friendly．

A．as if

B．as along as

C．on condition that

D．even though

— Was his father very strict with him when he was at school?

— Yes．he had never pratsed him ________ he became one of the top students in his grade．

A．after

B．unless

C．until

D．when

— Did the policeman let you in?

— No,________ I told him who I was．

A．if

B．once

C．as though

D．even though

I have kept that picture ________ I can see it every day as it always reminds me of my stay in the country．

A．in which

B．where

C．whether

D．when

Kids talk frequently about what they can do,________ many adults do the opposite,tending to talk about what they can't and why．

A．and

B．so

C．for

D．while

This is an illness that can result in total blindness ________ left untreated．

A．if

B．after

C．since

D．because

________ I wrote a little poem,I confidently placed it right on my father's plate on the diningroom table．

A．The first time

B．At first

C．It was the first time

D．For the first time

The head of the company promised to deal with matters of this sort ________ he returned to his office．

A．until

B．while

C．by the time

D．the moment

________,his family will wait for him to have dinner together．

A．However he is late

B．However late he is

C．No matter how late is he

D．No matter he is how late

— The vase cost me almost 100 yuan．

— Well,it was crazy of you to spend so much money ________ you could buy a much cheaper one．

A．while

B．if

C．because

D．when