——Why couldn’t they catch the 6:30 train ?
——Because they were delayed by .
| A．some heavy traffics | B．heavy traffic |
| C．a heavy traffic | D．any heavy traffic |
The doctor told me to __________ for a week.
| A．lay aside | B．lay out | C．lay off | D．lay down |
They were trying to remove harmful ___________ from cigarettes.
| A．content | B．substances | C．materials | D．mixtures |
Jack was sure to get this year’s scholarship as the standards of scholarship were not terribly_________
| A．tough | B．rough | C．difficult | D．demanding |
I can’t put up with the _____atmosphere here.
| A．silent | B．aimless | C．lifeless | D．deadly |
The government will __________ the country through the difficulties ahead.
| A．direct | B．lead | C．guide | D．draw |