It was 1995 __________ we began to develop the new computer system.
| A．when | B．which | C．since | D．that |
. It looks ______ you are ill. You should go to see the doctor.
| A．as | B．as though | C．as well | D．even though |
Please ______ your sister to bring the ticket for the concert.
| A．remind | B．remember | C．warn | D．let |
Be careful ! The slightest spark could ______ the fireworks.
| A．set about | B．set off | C．set out | D．set up |
. The police are offering a $ 60,000 _____ for information about the killer.
| A．price | B．prize | C．award | D．reward |
People generally think that smoking is a bad ______ .
| A．custom | B．habit | C．behavior | D．action |