2 . Most people know what it is like to have their blood pressure taken but few understand ________ the numbers that are used to record blood pressure mean.

A．what

B．how

C．which

D．as

3 . It is ________ the fish can survive out of water for months ________ makes them the coolest.

A．where… that

B．when… that

C．that… that

D．what… that

4 . What we need, rather, is the recognition ________ bringing up children involves a partnership of parents.

A．that

B．which

C．of

D．when

6 . As it turns out, there is a small toy hidden inside the cake, and the prize will be given to _________ finds the toy in their serving.

A．who

B．whom

C．whoever

D．whomever

7 . __________ 110 when there is an emergency both in public and at home.

A．Dialing

B．Dial

C．to dial

D．Dialed

8 . Steve Jobs took the trouble ________ a calligraphy class, though none of ________ he learned in it seemed to have practical application in his life.

A．to attend……which	B．to attend…what
C．attending…what	D．attending…which

9 . Appreciating a poet’s reading of his own works is very beneficial because we can understand the poem better ________ the poet places emphasis or pauses.

A．at where

B．from where

C．in which

D．from which

10 . It was widely confirmed by scientists that that was exactly ________ global greenhouse gas emission needs to be addressed as soon as possible.

A．why

B．how

C．when

D．whether