Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.
| A．to see | B．to be seen |
| C．seeing | D．seen |
I wrote him a letter to show my _____ of his thoughtfulness.
| A．achievement | B．agreement |
| C．attention | D．appreciation |
We look forward to the day when the motorcar has been replaced by some less dangerous ____ of transport.
| A．methods | B．means | C．manners | D．ways |
---- I’m sorry I stepped outside for a smoke. I was very tired.
---- There is no _____ for this while you are on duty.
| A．reason | B．excuse | C．cause | D．explanation |
No regular advertiser dare produce anything that fails to stick to the ____ of his advertisement.
| A．standard | B．level | C．text | D．promise |
I listened to Dr. Johnson’s lecture about biology, but I failed to get its key ____.
| A．words | B．notes | C．messages | D．points |