— Why? Tom, your shirt is so dirty! — Mum, I ＿＿ my storeroom downstairs。
#104430
A
cleaned
B
have worked
C
was cleaning
D
have been cleaning
推荐题目
—Why are you so depressed? —I _____ my MP4 player on the bus.
#102992
A
had lost
B
am lost
C
have lost
D
was lost
Professor Smith, along with his assistants, _____ on the project day and night to meet the deadline.
#101966
A
work
B
working
C
is working
D
are working
You should understand the traffic rule by now. You’ve had it ________ often enough.
#101797
A
explaining
B
to explain
C
explain
D
explained
----Why ? Where’s the key to the meeting room? ----Dear me! You ______it in the taxi!
#104586
A
had never left
B
didn’t leave
C
never left
D
haven’t left
— Have you heard from Jane recently?— No, but I ____ her over Christmas.
#104562
A
saw
B
will be seeing
C
have seen
D
have been seeing