—I have got a headache.—No wonder.You___in front of that computer too long.
#104063
A
work
B
are working
C
have been working
D
worked
推荐题目
– Why isn’t the recorder ready yet?--- I’m sorry, sir. It ______ in the factory.
#102923
A
is being repaired
B
is repaired
C
has been repaired
D
hasn’t repaired
Microsoft ended support for Windows XP after April 8, which _______a major operating system for some Chinese computer users, and advised users to upgrade to Windows 8.1.
#99227
A
remained
B
remains
C
is remaining
D
is remained
The teacher told us that light ______ faster than sound.
#103618
A
traveled
B
had traveled
C
is traveling
D
travels
—Why does the lake smell terrible?—Because large quantities of water______.
#101560
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
---What a long queue!--- Yeah．We ________________ up in the past few hours for tickets back home．
#102498
A
queued
B
have queued
C
are queuing
D
have been queuing