Science and technology are advancing so quickly that________ is a possibility today may be a reality tomorrow．
| A．that | B．which | C．不填 | D．what |
I saw no more than one copy left in the bookshop. Will you go and buy ______?
| A．it | B．some | C．any | D．one |
Does _______ matter if he can’t finish the job on time?
| A．this | B．it | C．he | D．that |
I don’t think _______ possible to master a foreign language without much memory work.
| A．it | B．that | C．its | D．this |
Therearetworoadsandeither ________tothestation.
| A．leads | B．lead | C．areleading | D．isleading |
Whenandwherethistookplace_________stillunknown.
| A．are | B．were | C．is | D．has |