_______ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.
34. ---You have given us a wonderful Chinese dinner, Mrs. Wang. ---_________________.
33. He got well-prepared for the job interview, for he couldn’t risk the good opportunity______.
32._____from lightweight materials,the robots are about the size of a human arm or smaller.
31.The fact that smoking is harmful to health is____most smokers are quite aware of.
30.It was_________ back home after the experiment.