Which of the following sentences is INCORRECT?
A. New machinery were introduced in the factory.
B. Poultry are very expensive in the city.
C. The police are investigating the murder.
D. The militia were called out to rescue flood victims.
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Nowadays, the iron and steel industry ________ an important part in our national economy.
A. plays
B. played
C. play
D. playing
Mr. Wells, together with all the member of his family, ________ for Europe this afternoon.
A. are to leave
B. are leaving
C. is leaving
D. leave
The statesman and writer you talked with last month ___ at today's conference.
A. was present
B. was presenting
C. were present
D. were presenting
血液中生物活性最强的甲状腺激素是
A. 碘化酪氨酸
B. 四碘甲腺原氨酸
C. 二碘酪氨酸
D. 三碘甲腺原氨酸
E. 逆-三碘甲腺原氨酸