.
Mary is a(n) _______ customer, so the waiter knows her likes and dislikes.
| A．usual | B．ordinary | C．common | D．regular |
Bill was doing a lot of physical exercise to build up his_______.
| A．ability | B．force | C．strength | D．mind |
Put the ___ of your tongue against your upper teeth when you produce the sound.
| A．tip | B．top | C．peak | D．pole |
It is said that dogs will keep you _________for as long as you want when you are feeling lonely.
| A．safety | B．company | C．house | D．friend |
You have been sitting on my hat and now it is badly out of _____.
| A．date | B．shape | C．order | D．balance |
At the meeting they discussed three different ______to the study of mathematics.
| A．approaches | B．means | C．methods | D．ways |