American women usually identify their best friend as someone _______ they can talk frequently．
| A．who | B．as | C．about which | D．with whom |
During the reconstruction of the city, many modern tall buildings went up _________ old shabby houses were torn down.
| A．where | B．in what |
| C．in which | D．Which |
If I were rich, I should help them out. _________，I can do nothing.
| A．As is often the case | B．As is it |
| C．As the case is often | D．As it is |
I don't think Maria will be disappointed at the news, but I will see her _________ she is.
| A．as if | B．so that |
| C．in case | D．even though |
_________, I could not memorize the text.
| A．However hard did I try | B．However hard I tried |
| C．However I tried hard | D．However I had tried hard |
The sons and daughters said they never fully appreciated their parents _________ it was too late to tell them.
| A．as | B．that |
| C．until | D．When |