37( ) I came into the office, the teachers were having a meeting.

A. 　 are

B. 　 have been

C. 　 is

D. 　 be

A. 　 may go

B. 　 should go

C. 　 should have gone

D. 　 must have gone

A. 　 aren＇t you

B. 　 is it

C. 　 isn＇t it

D. 　 are you

A. 　 are to

B. 　 is to

C. 　 am to

D. 　 were to

A. 　经济、社会、环境的协调发展

B. 　经济的发展

C. 　人口的发展

D. 　高科技的发展

A. 　自然经济和半自然经济的产物

B. 　资本主义制度的产物

C. 社会主义制度的产物

D. 　社会化大生产的产物

A. 　 like

B. 　 same

C. 　 alike

D. 　 same ones