设供应商零件的关系模式为SP(Sno,Pno,Qty) ,其中Sno表示供应商号，Pno表示零件号，Qty表示零件数量。查询至少包含了供应商"168"所供应的全部零件的供应商号的SQL语句
(4)
FROM SP PX
WHERE (5)
(SELECT *
FROM SP SPY
WHERE (6) AND NOT EXISTS
(SELECT *
FROM SP SPZ
WHERE (7) ) )

---Could you tell me _________?

---You can take the No. 1 bus.

A．how can we get to Xingyi Airport

B．how we can get to Xingyi Airport

C．how do we get to Xingyi Airport

D．how we got to Xingyi Airport