--- Where ___________ your pen pals from? --- The United States.
| A．does | B．do | C．is | D．are |
—Where are Maria and Kangkang?
—They _____ England.
| A．have been to | B．are away | C．have gone to | D．had been in |
—What has happened in your hometown?
— Great changes _____ in my hometown recently.
| A．have been taken place | B．have taken place |
| C．have been happened | D．was happened |
—_____ the population of the U.S.A. in 2005?
—It _____ about 296 million.
A.What is; is B.What was; was
C.How many is; was D.How many was; is
—They have been to Australia.
—So _____ I.
| A．do | B．have been | C．did | D．have |
—Our school is beautiful!
—It will be more beautiful if more trees and grass _____ by us.
A. plant B. is planted C. are planted