She asked _____ we were getting on well with our work.

A. how  B. if  C.what  D. that

During the next ten years we both worked day and night to

_____ the money we had borrowed.

A. pay off    B. pay for    C. pay to    D. pay back

Everybody in the little town knew my first teacher, so we had no _____ finding his home.

A. difficulties in  B. difficulty with   C. difficulty  D. difficulty to

We have been _____ by all our friends since we settled in the new house.

A. called on     B. called at    C. called into    D. called for

I _____ her voice at once on the phone, though we hadn't seen each other for ten years.

A. heard    B. knew    C. realized    D. recognized