5、tD.most16、 This box is___ that one. A. heavy than B. so heavy than C. heavier as D. as heavy as 17、When we speak to people, we should be ' . A. as polite as possible B. as polite as possibly C. as politely as possible D. as politely as possibly 18、 This book is____ that o
6、ne, but____ than that one. A. as difficult as; expensiveB. as more difficult as; more expensive C. as difficult as; more expensive D. more difficult as; as expensive 19、I think the story is not so ___ as that one. A. interestingB. interested C. more interesting D. most in
7、teresting20、His father began to work____ he was seven years old. A. as old as B. as early as C. since D. while 21、I think science is _ than Japanese. A.much important B. important C. much more important D. more much important22、 This pencil is___ than that one. A.longest