----What a beautiful picture!
----It’s years ______ I painted a picture as beautiful as this one.
| A．that | B．since | C．when | D．before |
They met for the first time, but they talked happily as if they______ good friends for a long time.
| A．have been | B．were | C．are | D．had been |
People planted trees on the waste hills_________ water and soil loss.
| A．to decrease | B．decreasing |
| C．decreased | D．decrease |
Judging from his accent, he_______ be from Australia.
| A．needn't | B．mustn't | C．can't | D．wouldn't |
-Can we sit at the table by the window? -I'm sorry, but it_______ already
| A．has taken | B．has been taken |
| C．was taken | D．took |
They reached the top of the mountain__________ they could see the highway wandering before them.
| A．which | B．why | C．whose | D．where |