In his letter, he said it was the third time that he ______ Zhuhai.
| A．had visited | B．visited | C．has visited | D．would visit |
It's really time I should go home, but I'm enjoying myself, so I ______ here a bit longer.
| A．am staying | B．have stayed | C．stayed | D．stay |
.It is said that pandas ___________ in our country year after year.
| A．are being disappeared | B．are disappearing | C．will be disappeared | D．will disappear |
--- How long have you ___________?
--- It’s about ten years since we ___________.
| A．married, married | B．been married, were married |
| C．got married, got married | D．been married ,got married |
Mr. Smith is one of the foreign experts who ___________in China.
| A．works | B．is working | C．are working | D．has been working |
30. My parents have promised to come to see me before I _____ for Africa. 
| A．have left | B．leave | C．left | D．will leave |
Tom ______ for 5 years, but he has been leading a new life since he was set free.
| A．was put in prison | B．was in prison |
| C．has been put in prison | D．has been in prison |
．You ________things about. Look! What a mess in your room!
| A．always throw | B．have always thrown |
| C．are always throwing | D．have always been throwing |
The No. 8 bus _______ to Chengdu college of Geology, and not to Sichuan University.
| A．are gone | B．is being gone | C．goes | D．are going |
Tom, who _________English for 20 years in English, now has been appointed headmaster of our school．
| A．had taught | B．has taught | C．taught | D．had been teaching |