Selecting a mobile phone for personal use is no easy task because technology __________ so rapidly.
#104438
A
is changing
B
has changed
C
will have changed
D
will change
推荐题目
I ________ for Beijing next Saturday. Do you know when the earliest plane ________ on Saturday?
#99485
A
am leaving; takes off
B
Leave; takes off
C
leave; is taking off
D
am leaving; is taking off
——Is there any possible way to help them get rid of such a bad habit? ——To tell the truth, it’s very hard. But we_______ on this problem.
#103283
A
worked
B
had worked
C
are working
D
had been working
Research _____ that over 81% of teachers are dissatisfied with their salary.
#100827
A
contrasts
B
indicates
C
highlight
D
reveal
Last night Bruce was observed________the building with two young men and take a taxi away.
#99129
A
leave
B
left
C
having left
D
to leave
With the help of high technology, many new substances（物质）______in the past years.
#102927
A
discovered
B
have discovered
C
had been discovered
D
have been discovered