—Could you tell me ______?
—Usually one hour and a half.
| A．how long it takes to fly to Shanghai |
| B．how long it took to fly to Shanghai |
| C．how long does it take to fly to Shanghai |
| D．how long did it take to fly to Shanghai |
— It’s raining. When did it start?
— As far as I know, it ____ for three hours.
| A．rains | B．rained |
| C．has rained | D．will rain |
I _______ the CDs to you if I have time tomorrow.
| A．return | B．returned |
| C．have returned | D．will return |
— What are the neighbors doing, Joe?
— Oh, they _______ a party.
| A．have | B．had |
| C．are having | D．have had |
Our English teacher, Mrs. Black, ________ in our school since 1992.
| A．works | B．worked |
| C．will work | D．has worked |
The Olympic Games ________ every four years.
| A．are held | B．were held |
| C．are holding | D．will hold |