—Does Li Ping serve in the army?
—No, but he ________ in the army for five years.
| A．served | B．has served |
| C．is serving | D．would serve |
He was __________ at the __________ waste of food in the school.
| A．shocked; shocked | B．shocking; shocked |
| C．shocking; shocking | D．shocked; shocking |
The doctors insisted that the patient was in danger, and that he __________on immediately.
| A．was operated | B．be operated | C．should operate | D．operated |
----Travelling helps us understand life better.
---- ___________.
| A．Actually | B．Exactly | C．Gradually | D．Especially |
Ladies and gentlemen, please fasten your seat belt. The plane __________.
| A．takes off | B．is taking off | C．has taken off | D．took off |
________ you have a large vocabulary, you will find it easy to read.
| A．Once | B．Before | C．Unless | D．Even though |