As the famous expert ______, the secret _____happiness is to think about positive things and stay optimistic.
| A．retells; on | B．reminds; to | C．remarks; of | D．respects; in |
If you put too many potatoes in that paper-bag it will _____.
| A．fail | B．explode | C．crack | D．burst |
The shop-assistant was straight with his customers. If an article was of _____ quality, he'd tell them so.
| A．humble | B．minor | C．inferior | D．awkward |
Violent programs on television may have a bad _____ on children.
| A．affection | B．pressure | C．influence | D．control |
Maria is a _____ person and never makes any unreasonable demands.
| A．sensitive | B．sensible | C．obedient | D．jealous |
There was a large box behind the door and Peter couldn't _____ falling over it in the darkness.
| A．help | B．resist | C．avoid | D．prevent |