I don't know ________ they have passed the exam．

A．what

B．whether

C．when

D．where

When Mary found that somebody had stolen her doll, she ________ crying her heart out．

A．ended up

B．picked up

C．brought up

D．took up

The Science Museum, ________ we visited during a recent trip to Britain, is one of London's tourist attractions．

A．which

B．what

C．that

D．where

He ________ in a shower last night and was wet through．

A．caught

B．was caught

C．had caught

D．is caught

The poor old man is ready to accept ________ help he can get．

A．whichever

B．however

C．whatever

D．whenever

Play, often seen as ________ activity for kids, is still important in ________ development of teenagers．

A．the; the

B．an; the

C．an; 不填

D．the; 不填

In my point of view, the question is not ________ the world is going to have a new economic crisis, but when．

A．that

B．how

C．what

D．whether

________ the housing price, several measures have been adopted in the last two years．

A．Lowering

B．Having lowered

C．To lower

D．To have lowered

Shooting, as ________ means of survival originally, developed into ________ sport only in the late 19th century．

A．a; a

B．the; the

C．a; the

D．the; a

Although the Eiffel Tower ________ to last for 20 years, it is still standing today．

A．has designed

B．had designed

C．is designed

D．was designed