Miss Green sounded _______ on the phone. She offered to help us with our studies.

A．politely

B．friendly

C．properly

D．smoothly

These physics problems are _______ difficult that _______ students can solve them.

A．such; few

B．such; little

C．so; few

D．so; little

—Hi, Mr. Tang ! I hear you’ll go to Italy. Have you read the _______ to the country?
—Yes. Now I know Italy has a long history and many places of interest.
A. instruction    B. introduction    C. direction D information

—I’m still wondering which school our son should choose.
— him alone, he can make up his mind.

A．Leave

B．Keep

C．Let

D．Allow