19、---- Why didn’t you try your best to stop him from doing so?

----I tried to, but ____ I could, the policemen turned up.

A. until            B. when           C. before        D. after      

18、There is a(an)  ____  that more graduates choose teaching as their permanent careers.

A. direction        B. attraction       C. tendency      D. attempt     

17、The coach asked his staff to ____ the large group of journalists waiting for him to announce his training plans.

A. adapt to         B. attend to       C. refer to        D. appeal to   

16、In 1994, China began collecting income tax from people earning more than 800 per month, but only 1% people earning more than ____.

A. that            B. it              C. those         D. one               

15、The Chinese yuan rose to a new high ____ the US dollar on Monday, China Daily has reported.

A. with            B. of             C. for           D. against          

14、In the office, I never seem to have time until 5:30 p.m.，___ many people have got home.

A. whose           B. where          C. on which      D. by which       

13、---- Was Martin sorry for what he had done?

----____. It was just like him.

A. Never mind     B. All right       C. Not really     D. Not surprisingly   

12、---- Oh! You bumped me!

---- I am sorry, but I ____ to catch the coming bus.

A. try           B. tried           C. am trying     D. was trying    

11、If we can ____ our present difficulties, then everything should be all right.

A. get over        B. come over      C. come across   D. get off  

10、----Has your father returned from Africa yet?

----Yes, but he ____ here for only three days before his company sent him to Japan.

A. was             B. has been            C. will be        D. would be