He ________ his homework before I came.A、has doneB、has been doingC、had doneD、would have

He is thoroughly __ in this newly developed branch of knowledge ___ computer science.

A、in home

B、in his home

C、at home

D、at his home

He will come home as soon as he ______ his homework at school. (finish)

The Chinese handicrafts he brought home are popular ______ his American friends.

A. with

B. within

C. in

D. to

A.On his way to home

B.On his way home

C.In his way home

D.In his way to home

It was()he arrived home()he realized that he had left his keys in the office.

A) until……that

B)not until……had

C) until……had

D)not until……that

A.He is attending his sick mother at home

B.He is on a European tour with his mother

C.He is in Europe to see his mother

D.He is at home on sick leave

A.go home

B.to his home

C.for the school

D.of the school

A.calling

B.called

C.to call

D.call