1) The old theater _____ at present. 
　　 A) is pulled down
　　 B) has pulled down
　　 C) is being pulled down
　　 D) is pulling down

　2) A power station _____ up in the district when we got there last year. 
　　 A) was set
　　 B) would set
　　 C) was being set
　　 D) is being set

　3) A new experimental electronics factory _____ near our college. 
　　 A) is being built
　　 B) was being built
　　 C) would be built
　　 D) had been built

　4) This question _____ at seven tomorrow evening. 
　　 A) is being discussed
　　 B) will be discussed
　　 C) would be discussed
　　 D) will discuss

　5) The new engine _____ in the lab at that time. 
　　 A) would be testing
　　 B) was testing
　　 C) had been tested
　　 D) was being tested