A. people find invisible diseases difficult to deal with
B. attacks by hidden enemies tend to be fatal
C. diseases with obvious signs are easy to cure
D. people tend to overlook hidden dangers caused by pesticides
A. limited exposure to them does little harm to people's health
B. the present is more important for them than the future
C. the danger does not become apparent immediately
D. humans are capable of withstanding small amounts of poisoning
A. is not the worst of the negative consequences resulting from the use of pesticides
B. now occurs most frequently among all accidental deaths
C. has sharply increased so as to become the center of public attention
D. is unavoidable because people can't do without pesticides in farming
A. Pessimistic.
B. Indifferent.
C. Defensive.
D. Concerned.
A. Man appears indifferent to what happens in nature.
B. Man acts as if he does not belong to nature.
C. Man can avoid the effects of environmental pollution.
D. Man can escape his responsibilities for environmental protection.
A.having seated
B.seating
C.seated
D.having been seated
A.Hello, Mr. Brown. Are you a doctor?
B.Morning, Prof. Brown. May I have a question?
C.Hi, Prof. John Brown. Can I ask what your specialty is?
D.Hello, Mr. John Brown. What brings you here?
A.You must be mistaken. I don't know you at all.
B.Hello, Brown! I haven't seen you for ages.
C.How do you do, Jane? Very nice to see you.
D.Hi, Jane. Welcome to China.
A. Take it easy.
B. It's unexpected.
C. You'll work hard later on, I guess.
D. Oh, I'm thrilled.
A. I didn't know you did needle work.
B. I think you have done a good job.
C. Where did you learn to do needle work ?
D. Why do you do needle work?
A. Yes, I could. I want to play football.
B. For me, running is not a problem. I'd like to do exercises.
C. Yes, storing a few things away is quite necessary, right?
D. All right. What do you want me to get?
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