This is a disease that can result in total blindness ________ left untreated．

A．after

B．if

C．since

D．unless

I thought things would get better, but ________ they are getting worse．

A．as it were

B．as it was

C．as is it

D．as it is

________ has finished the work ahead of time will be rewarded though we don’t know who it will be．

A．Those who

B．Anyone

C．Whoever

D．No matter who

－ Is your father well?

－ Yes, he ________．

A．sure is

B．is sure

C．certain is

D．is certain

I doubt ________ she will be asked to attend the meeting next year, for his speech this year was boring．

A．who

B．that

C．which

D．what

－ We need a person badly to be in charge of this design．

－ ________ the newcomer have a try?

A．May

B．Will

C．Shall

D．Need

－ I would like ________ it．

－ So would I, but we arrived too late．

A．to see

B．to have seen

C．seeing

D．having seen

－ Will you be on holiday soon?

－ Well, I’m too busy to take a holiday now．I’ll be able to take ________ two months from now．

A．this

B．that

C．it

D．one

In China, ________ bicycle is ________ popular means of transportation．

A．the, a

B．a, /

C．the, the

D．a, the

He must ________ a shower, for I can hear the water ________．

A．have, run

B．be having, run

C．have, running

D．be having, running