Mr Smith was so angry at all ________ Robert was doing _________ he walked out angrily.
My brother has been preparing carefully for the English exam, so that he can be sure of passing it at his first _______
——How long will you stay in Peking University? —— I don’t know. ________.
. Use your head, you’ll have an idea.
There are students in our schoo1.
Some people find the film Avatar difficult______.