It was quite a long time ________ he really realized the serious situation．

since

when

after

before

Everybody in the village likes Jack because he is good at telling and ________ jokes．

turning up

putting up

making up

showing up

“This is ________ most useful reference book,”a teacher from ________ European country told us in class．

the; a

a；不填

不填；不填

a; a

Father made a promise ________ I passed the examination he would buy me an MP4 player．

that

which

whether

that if

I'm afraid this is the best way ________ we can think of ________ you．

that; helping

that; to help

which; helping

which; to help

We were finally able to make the customers ________ of the quality of the refrigerator．

to convince

convincing

convince

convinced

He expects to ________ the business when his father retires．

pick up

make sense

take over

make up

A good story does not necessarily have to have a happy ending, but the readers must not be left ________．

unsatisfied

unsatisfying

to be unsatisfying

being unsatisfied

The English spoken in the United States is only slightly different from ________ spoken in England．

which

what

that

one

The Chinese language is different from many Western languages ________ it uses characters which have meanings and can stand alone as words．

unless

until

now that

in that