19.A.taken up B. put away C. looked up D. got in
18.A.all B. himself C. people D. Congress
17.A.made B. collected C. prepared D. chosen
16.A.sort B. else C. time D. invention
15.A.crowds B. union C. folks D. members
14.A.what B. when C. how D. why
13.A.until B. for C. since D. while
12.A.step by step B. back and forth C. again and again D. on and on
11.A.polite B. tired C. calm D. warm
10.A.say B. have C. deal D. cover