His mother left for work, ________ any of the dishes prepared for her．

A．not eating

B．didn抰 eat

C．not having eaten

D．having not eaten

________ the temperature might drop, coal was prepared for warming．

A．To consider

B．Considered

C．Considering

D．To be considered

If the weather is fine, we'll go, if ________, ________．

A．not; not

B．no; no

C．not; no

D．no; not

The president stood by a window inside the room, ________, looking over the square．

A．where I entered

B．into which I entered

C．which I entered

D．that I entered

Mr．Smith sold that magnificent cottage of his on the sea ________ 2,000,000 dollars．

A．at

B．for

C．to

D．by

Thank you for sending us ________ fresh vegetables of many kinds, you have done us ________　________ great service．

A．/; a

B．The; a

C．/;/

D．The;/

_________ is certain is _________ prevention is far more important than treatment．

A．It, that

B．What, that

C．As, what

D．That, what

The e－mail she had been looking forward to _________ at last, which made her very excited．

A．arriving

B．be arrived

C．arrived

D．being arrived

_________ in class made the teacher very angry．

A．Tom to laugh

B．Tom laughing

C．Tom’s laughing

D．Tom laughed

The USA _________ on several countries in the past years, which reminds us that a nation must be strong if it _________．

A．has started war, is to survive

B．started war, is going to survive

C．had started war, will survive

D．has started war, is about to survive