－Do the Alberts live next door to you?

－No, but they ________．

used to

used to be

used to do

used to be done

How to protect children web fans from unsuitable material on–line while encouraging them to use the Internet ________ in many parts of the world．

have lone been discussed

has long been discussed

were long been discussed

was long been discussed

The guard neglected his duty, and thus ________ himself the job．

costed

have costed

costing

cost

He ________ last weekend, didn’t he?

didn’t do anything

did nothing

hardly did anything

failed to do anything

The range discount cars issued by Golf Corps are still being honored, but ________ are being sold．

none

nothing

neither

no

The sign on the door reads：“In case of ________ fire, break the glass and push ________ red button．”

不填, a

不填, the

the, the

a, a

________ David says sounds right to Helen．That's why she has made up her mind to stay with him ________ happens．

Whatever; no matter what

No matter what; whatever

No matter what; no matter what

Whatever; however

She ought to stop working．She has a headache because she ________ all day long．

has been reading

had read

is reading

has been read

Modern China is experiencing a completely new period ________ respect for science and creativity has become the guiding principle of society．

of which

where

in which

that

I won't give you any help ________ you tell me the truth．It's none of my business．

unless

since

as if

even though