21.--Does Liu Hua ever guess the meanings of English words?

21.--Does Liu Hua ever guess the meanings of English words?
--He ______ guesses the meanings of new words.He uses his dictionary all the time.
A.usually B.always C.never D.sometimes
22.The meeting will be held in half an hour,but they haven't got everything ready ______.
A.ever B.already C.yet D.still
23.--How well did you do in the maths exam?
-- Better than before.I think it was ______ difficult than the last one.
A.more B.less
C.much D.very
24.--Do you like the two skirts?
--The yellow one is good but the green one looks ______.
A.nicer B.nice C.best
25.-- This box is ______ heavy for me to carry.Can you help me?
-- Certainly.
A.so B.much C.very D.too
26.-- What do you think of his speech?
-- Oh,wonderful.But his voice sounds really ______ when he first started speaking.
A.aloud B.worried
C.nervous D.quiet
27.The food on the plate smells ______.You can't eat it.
A.delicious B.badly
C.well D.bad
28.Shark is getting old and cannot jump as ______ as he did.
A.high B.higher
C.highest D.much higher
29.The experts think that India's population may be ______ than China's ______ 2020.
A.much; by B.more; in
C.larger; by D.larger; on
30.It is ______ nice of you to say so.
A.truly B.true
C.really D.real