21.—Where are Maria and Kangkang? —They _____ England.
A.have been to B.are away C.have gone to D.had been in
22._____ the government, the children in the poor village can go to school again.
A.Thanks for B.Thanks to C.Thank to D.Thank for
23.—What did you do during your summer holiday?
—I spent my holiday _____ English in Summer Classes.
A.improving B.improves C.to improve D.improve
