In order to learn the _______ of the family business, Bill took a job as messenger boy in one of the offices.
| A．ins and outs | B．dos and don’ts |
| C．heads and tails | D．t’s and i’s |
. The temperature can fall to –50°._____ is, 50°below freezing point.
| A．Which | B．It | C．This | D．That |
She likes to use words ____ is clear to him.
| A．of which the meaning | B．of which meaning |
| C．whose of meaning | D．meaning of which |
Babies are not born with __ moral sense; they cannot tell __ difference between right and wrong.
| A．a 不填 | B．不填；a | C．a; the | D．the; the |
She soon came to her ____ after a blood transfusion.
| A．sense | B．herself | C．senses | D．mind |
. Every new thought or idea has to ___ what we already know.
| A．be connect with | B．be connected | C．be connected to | D．be connecting to |