Some studies even suggest that playing more ________ bigger brains that are ________ at reasoning and learning．

A．refers to; good

B．turns to; better

C．sticks to; good

D．leads to; better

Grandmother is in ________ good health, which is ________ pleasure to us．

A．a; the

B．a; a

C．不填；a

D．不填；不填

He must have finished the work by the end of last month, ________ he?

A．mustn’t

B．hadn’t

C．didn’t

D．hasn’t

Despite her illness, she had lost ________ of her enthusiasm for life．

A．not anyone

B．none

C．nothing

D．not all

________ the task on time, he was fired by the boss．

A．Not completed

B．Not having completed

C．Not have completed

D．Not being completed

I admit that there are problems, ________ I don’t agree that they cannot be solved．

A．while

B．if

C．in case

D．before

－Why, Jack!Someone seems to have called you over there．

－Yes?I ________ that．

A．am not realizing

B．haven’t realized

C．didn’t realize

D．don’t realize

In order to improve English listening, ________．

A．he bought a Walkman

B．his father bought him a Walkman

C．a Walkman was bought by him

D．a Walkman was offered to him

Twenty students from one high school were ________ such an experience．

A．enough lucky to share

B．to share enough lucky

C．enough to share lucky

D．lucky enough to share

Sometimes I was thinking about ________ my own how I could make friends with a man who had little ________ common with me．

A．with; in

B．in; in

C．on; on

D．on; in