Teachers have to constantly updatetheir knowledge in order to maintain their professional ______.(2011 .江苏)
The year 1949 the birth of a new China.
Katy has lived in New York for several years.she doesn’t get used to the life there
一Why is John so poor at his lessons?一He never studies ,he plays computer games all day
---- One more question, Sir? ----Wait a minute. I ____ your questions for more than 30 minutes without a break. Where is my cup?
Peter has been busy these days and seldom ____ to come over to have a chat with me.