When someone has money 【B1】 he wants to put in a safe place, he 【B2】 takes it to a bank. Until recently the very 【B3】 of the bank building was designed to 【B4】 people that their money would be safe. There were thick, solid walls and barred windows. All the windows and doors were wired to set 【B5】 the burglar alarms if anyone tried to 【B6】 his way in.
The vaults where his money was kept had huge, steel doom with 【B7】 locks. 【B8】 guards with pistols in their holsters were always on 【B9】 in the bank. The tellers cages--the cubicles 【B10】 the bank clerks, or tellers, worked-actually 【B11】 cages. They had gratings across the front, high sides and back, and a door that could be opened only by pushing a release button.
The new style. of bank design 【B12】 some of these 【B13】 features, but the idea now is to make the bank 【B14】 like a friendly place 【B15】 than a forbidding fortress. The modem bank buildings are open and light, 【B16】 large glass windows and doors. The tellers' cages have been 【B17】 by flat, unobstructed counters. The 【B18】 and burglar alarms are still them, but they are 【B19】 noticeable than they 【B20】 to be.
【B1】

A. and
B. but
C. that
D. what