________ that this region was so rich in natural resources．

A．Little he knew

B．Little did he know

C．Little he did know

D．Little he had known

Busy ________ he is, he can fulfill the task ahead of schedule．

A．because

B．as

C．no matter how

D．although

Parents are always ________ for their children's safety when the children are out．

A．eager

B．anxious

C．keen

D．worried

I ________ of your trying to earn some money, but please don't neglect your studies．

A．support

B．agree

C．disagree

D．approve

________ understand how the human body works, you need to have some knowledge of chemistry．

A．So as to

B．In order to

C．In order that

D．In order

My father is the ________ lawyer for a big Olympic project．

A．chief

B．main

C．leading

D．major

There was nothing to suggest that she ________ to kill herself．

A．should intend

B．intend

C．intended

D．intending

He ________ a knowledge of the language by careful study．

A．achieved

B．won

C．gained

D．acquired

Not a single song ________ at yesterday's party．

A．she sang

B．sang she

C．did she sing

D．she did sing

So difficult ________ it to live in an English-speaking country that I determined to learn English．

A．I have felt

B．have I felt

C．I did feel

D．did I feel