The crime was not discovered till 48 hours later, ________ gave criminals plenty of time to get away．

A．when

B．which

C．that

D．it

To make up an objective test, the teacher writes a series of questions, ________ has only one correct answer．

A．some of which

B．each of those

C．that

D．each of which

The book, the cover ________ is broken, is not mine．

A．of it

B．for

C．whose

D．of which

This is Mr Smith, ________ I think has something interesting to tell you．

A．who

B．whom

C．that

D．/

The factory produces half a million pairs of shoes every year, 80％ ________ are sold abroad．

A．of which

B．which of

C．of them

D．of that

________ is reported in the newspapers，talks between the two countries are making progress．

A．It

B．As

C．That

D．What

Mark Twain，________ was Samuel Clemens，wrote many famous novels．

A．the real name

B．what his real name

C．his real name

D．whose real name

Honey, have we got ________ food in the fridge for next week?Go and have a look, will you?

A．a little

B．plenty of

C．many

D．enough

－Shall we put off the conference until next Thursday?

－________．

A．That’s it

B．It’s your turn

C．That’s a good point

D．It’s up to you

________ is well known to the world, Africa had contacts with India from the earliest times．

A．It

B．What

C．As

D．Which