The manager of the travel agency was trying hard to figure out how he would attract more customers _____ an extraordinary idea _____  his mind and he immediately knew what to do.

The manager of the travel agency was trying hard to figure out how he would attract more customers _____ an extraordinary idea _____  his mind and he immediately knew what to do.

The manager of the travel agency was trying hard to figure out how he would attract more customers _____ an extraordinary idea _____  his mind and he immediately knew what to do

1. A.
   when; flashed across
2. B.
   as; crossed
3. C.
   when; hit
4. D.
   before; struck

The manager of the travel agency was trying hard to figure out how he would attract more customers _____ an extraordinary idea _____ his mind and he immediately knew what to do.

　 A. when; flashed across　 B. as; crossed　 C. when; hit　 D. before; struck