People who can communicate ______ are always in demand when it comes to job-hunting.
| A．carefully | B．quickly | C．smoothly | D．seriously |
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
| A．of; at | B．by; in |
| C．of; on | D．on; at |
Everybody in the village likes Jack because he is good at ______ and telling jokes.
| A．making up | B．turning up |
| C．putting up | D．showing up |
Kidswillbe______abouteverythingwhentheyreacha certainage.
| A．anxious | B．curious |
| C．cautious | D．conscious |
Mary said she was by no means angry; ______, she was glad to be able to make herself clearly understood.
| A．all in all | B．for one thing |
| C．on the contrary | D．by the way |
— Would you mind giving your advice on how to improve our business management?
— If you make ______ most of the modern equipment, there will be ______ rise in production.
| A．/; / | B．/; a | C．the; a | D．the; / |