Eye doctors recommend that a child's first eye exam ________ at the age of six months old．

A．was

B．be

C．were

D．is

________ how others react to the book you have just read creates an added pleasure．

A．Hearing

B．Hear

C．Having heard

D．To be hearing

If we leave right away, ________, we'll arrive on time．

A．hopefully

B．curiously

C．occasionally

D．gradually

The children, ________ had played the whole day long, were worn out．

A．all of what

B．all of which

C．all of them

D．all of whom

As the world's population continues to grow, the ________ of food becomes more and more of a concern．

A．worth

B．supply

C．package

D．list

I ________ myself more－it was a perfect day．

A．shouldn't have enjoyed

B．needn't have enjoyed

C．wouldn't have enjoyed

D．couldn't have enjoyed

Mary worked here as a ________ secretary and ended up getting a full-time job with the company．

A．pessimistic

B．temporary

C．previous

D．cautious

The party will be held in the garden, weather ________．

A．permit

B．to permit

C．permitting

D．permitted

There are many mistakes in his essay, ________ his failure．

A．to lead to

B．leading to

C．led to

D．that led to

________ the work, they have to stay there for another two weeks．

A．Not finishing

B．Not finished

C．Not having finished

D．Having not finished