高中英语句型转换单选题

______ takes a lot of concentration and a great sense of balance to stay on it.

A．It

B．This

C．What

D．That

—Mum，I am afraid I won’t do well in the coming test.
—Honey，________more careful，________you will make it.

A．is；so	B．be；and
C．be；then	D．being；and

Ellen was a painter of birds and of nature，________，for some reason，had withdrawn from all human society.(2012·浙江，17)

A．which

B．who

C．where

D．whom

Seeing her father come back, ______________.

A．tears ran down her cheeks	B．Her tears ran out
C．she burst into tears	D．She burst into crying

Reporters are _______ to get all facts straight and present their stories fairly.

A．believed

B．supposed

C．thought

D．considered