－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

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

A．direction

B．attraction

C．tendency

D．attempt

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

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

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

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

－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

－Oh!You bumped me!

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

A．try

B．tried

C．am trying

D．was trying

If we can ________ our present difficulties, then everything should be all right．

A．get over

B．come over

C．come across

D．get off

－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