Foreign attacks on U． S． soil
1812 ---- During the War of 1812, British forces（军队） burned the new capital at Washington, D． C． They also attacked Baltimore and New Orleans and captured（占领） Detroit, which at the time was a remote military outpost (前哨基地)．
1846 ---- A brief invasion（入侵）by Mexican troops across the Rio Gande began the U． S． - Mexican War in 1846． But the remaining action in that conflict（冲突） occurred in California, New Mexico and in Mexico． California and New Mexico belonged to Mexico at the time．
1916 ---- Mexican revolutionaries led by Pancho Villa attacked the town of Columbus, N． M．, on March 9, 1916．
1941 -- Japan attacked Pearl Harbor in Hawaii on Dec． 7, 1941, killing nearly 2,400 people and forcing America into World War II．
1993 ---- Terrorists（恐怖主义者） blew up a truck bomb in the basement of the World Trade Center in February 1993, killing six people and injuring more than 1,000．
2001 ---- Terrorists hijacked(劫机) several planes on Sep．11, 2001． Two ploughed into（撞入） New York’s World Trade Center (WTC), toppling the two highest buildings in the city; a third seriously damaged the Pentagon（五角大楼）． The fourth hijacked plane crashed in Pennsylvania． Several thousand people were killed in the attacks．
During the War of 1812, British forces did the following except that _____．
A．they captured Detroit
B．they attacked Baltimore and New Orleans
C．they attacked the town of Columbus, N． M．
D．they burned the new capital at Washington, D． C．
During the September 11th terrorist attacks, _____．

A．terrorists hijacked three planes

B．destroyed the Pentagon completely

C．killed six people and injured more than 1,000

D．two planes knocked into New York’s World Trade Center

The underlined word “toppling” in the last paragraph means _____．

A．reaching the highest point of	B．causing to fall
C．knocking into	D．building

How many foreign attacks mentioned in the passage did the US have?

A．5

B．6

C．7

D．8