I have heard from my father, is in American.
A. which B. that C. from whom D. who
Swan Lake is a famous ballet(芭蕾) in four acts, ________ on a German fairy tale.
A. basing B. based C. bases D. to base
He had no idea of how the climb would be _______ he was half way up the mountain.
A. when B. until C. while D. as
—Would you like some more chicken?
—No, thanks. I am ______ a diet and try to ______weight.
A. on; lose B. on; put on C. in; have D. in; lose
Alien had to call a taxi because the box was _____ to carry all the way home.
A. much too heavy B. too much heavy
C. heavy too much D. too heavy much
___ more and more forests destroyed, some animals are facing the danger of dying out.
A. As B. By C. For D. With
