He's an intelligent boy．He ________ made such a foolish mistake．

can't have

may not have

might not have

mustn't have

He didn't ________ what I read because his mind was on something else．

hold on

catch on

take in

get over

He has ________ housework to do, so he seldom goes to the cinema with his child．

a large number of

a great many

a little

a great deal of

It's very important for a student to ________ a good state of mind while taking the college entrance examination．

keep out

keep on

keep up

keep off

I've heard ________ that Elizabeth is a tough businesswoman．

it

her

what

that

I ________ to be quite afraid to live in that city, but now I have ________ to the life there．

used; used

used; been used

was used; got used

got used; been used

I recommended ________ an English-Chinese dictionary, which I thought would be of great help to his studies．

buying

bought

to buy

he bought

________ well prepared you are, you still need a lot of luck in mountain climbing．

however

whatever

no matter

although

The young couple wrote to Mr．Grand to ________ his warm reception during their visit to his farm．

acknowledge

update

consult

acquire

However, in ________ recent years, ________ Niagara Falls have come to be appreciated more for their natural beauty as ________ wonder of Nature．

/; the; a

the;/; the

/; the;/

the;/; a