Principal White has been working in the school for about 20 years, all his energy to teaching and researching as well as the running of a healthy school．
#102248
A
devoted
B
devoting
C
to devote
D
and devote
推荐题目
Scientists still wonder whether cloning will help or harm us and where it ____ us.
#103545
A
has led
B
is leading
C
had led
D
would lead
In the past few years, sea ice ____ in the Arctic as a result of global warming.
#101821
A
had melted
B
has been melting
C
melted
D
is melting
In the questionnaire, the subjects are questioned whether they____ no smoking in the public area.
#101063
A
agree
B
comment
C
advocate
D
conduct
They _______ on the program for almost one week before I joined them, and now we ________ it as no good results have come out so far.
#104610
A
had been working; are still working
B
had worked; were still working
C
have been working; have worked
D
have worked; are still working
--Why didn’t Tom have his lunch? It’s already one o’clock.---His pet bird ____this morning. He____still for quite a long time in his room crying.
#104013
A
died; had sat
B
has died; has sat
C
has died; is sitting
D
died; has been sitting