Mr.Morse，who graduated from a famous medical university，spent years ______ his skills as a doctor.

A．adapting　

B．acquiring

C．occupying　

D．concentrating

—Alice looks blue today.

—Yes，I asked her，but she wouldn't say ______ troubled her.

A．why was it thatB．that was whyC．it was what D．what it was that

The managing director was to______the accident,although it was not his fault.

A.be blamed for                   B.be blamed on

C.blame for                         D.blame on

Enough______ to stop the forest______ since the 1980’s.

A.has been done;be cut down

B.has done;cutting down

C.has been done;being cut down

D.had done;from being cut down

The time is approaching_______we will have to leave the lonely island.

A.if B.whether            C.that             D.when

—Come in, please. Make yourself at home.

—I'm glad you like it._____________________.

A.Thanks. You have a nice place here.

B. Oh, this picture is so beautiful!

C. Thanks. What nice food you've prepared!

D OK. Let me look around your new house.

Flight BA 123 to Vienna is now boarding at_______.

 A. Gate 21    B. 21St Gate    C. the Gate 21    D. 21 Gate

She liked the dictionary so much that she would like to take it ____________ it cost.

A. why     B. how much      C. whatever     D. how expensive

In the middle of the room stands a__________ table.

A. beautiful wooden round         B. round wooden beautiful

C. wooden beautiful round        D. beautiful round wooden

We will take________ wants to go there for a sight - seeing.

A. whoever        B. who         C. anybody        D. all that