21. Outside my office window there is a fire ?____? on the right.?
A. escape B. ladder C. steps D. stairs?
22. I ?____? with the Browns during my stay in New York City.?
A. put in B. put down C. put on D. put up?
23. Operations which left patients ?____? and in need of long periods of discovery time now leave them feeling relaxed and comfortable.?
A. exhausted B. unhealthy C. upset D. fearful?
24. Farmers are allowed to grow small gardens of their own and they sell their vegetables ?____? the black market.?
A. on B. at C. in D. for?
25. The electric fan does not work because of the ?____?of service.?
A. pause B. break C. interruption D. breakdown