单选题
When two hands meet, we pass on something of ourselves. After (41) to Mark Twain, Helen—who was both deaf and blind—commented, "I can feel the twinkle of his eye (42) his handshake." In some indefinable way, Twain had (43) his charm to Keller. And that's probably been true of the handshake all the (44) back to its earliest days, (45) no one can tell its actual (46) . A common explanation is that (47) early man encountered a stranger, he (48) out his hand to show he had no weapon. From this, supposedly, (49) the handshake. "Not so", says historian Brian Burke. He believes, the handshake (50) "putting your blood behind your breath." He explains that ancient people (51) the spoken word alone, and they used the handclasp to signify that their (52) was backed up by the (53) of their heart—i.e., their blood. (54) , the handshake suggested trust. That (55) of trust has survived to this day. People in business often (56) agreements simply by declaring, "Let's shake (57) it." Perhaps the most (58) handshake took place on July 17, 1975, during the Apollo Soyuz get together in space. After the two crafts came together, American astronaut Thomas Stafford (59) the extended hand of Soviet cosmonaut Alexey Leonov. The (60) to the world was one of friendship and peace.
单选题
A. introducing B. introduced C. being introduced D. having introduced