Numerous materials are available to ________．

A．today of designers

B．today's designers

C．today's of designers

D．today designers

________ receives only a small portion of the total amount of the sun's energy．

A．The earth's surface

B．The surface earth

C．The surface of earth

D．The earth surface

Yesterday evening we had a lovely evening at ________．

A．Peter and Helen's

B．Peter and Helens

C．Peter and Helen

D．Peter's and Helen's

I had my hair cut at the ________ around the corner．

A．barber

B．barbers

C．barber's

D．barbers'

He told me ________ would come to his birthday party．

A．many Jack friends

B．Jack's many friends

C．many Jack's friend

D．many friends of Jack's

After he checked up my ________ heart, the doctor advised him to rest for a few days．

A．father-in-law's

B．father-in-law

C．father's-in-law

D．father's-in-law's

He has written several books, but his last works ________ well known among his friends．

A．have

B．have been

C．is

D．are

Physics ________ with matter and motion．

A．deal

B．deals

C．dealing

D．are

Professor Mackay told us that ________ of lead are its softness and its resistance．

A．some property

B．properties

C．some properties

D．property

All the people at the conference are ________．

A．mathematic teachers

B．mathematics teacher

C．mathematics teachers

D．mathematic's teachers