Mr. Wu___this math problem____him many times, but he still doesn’t understand it.
#38768
A
explains ; to
B
has explained ; for
C
has explained ; to
D
explained ; with
推荐题目
–Your weren’t at home when I called you yesterday evening. --Oh, I outside at that time.
#38732
A
visited
B
was visiting
C
was visited
D
would visit
-- ________ your homework yet?-- Not yet. I _______ it.
#38354
A
Have you done; am doing
B
Did you do; am doing
C
Have you done; did
D
Did you do; did
___How time flies!It’s already twelve o’clock. ___ Oh,really? I ______ it at all.
#41598
A
don’t realize
B
Didn’t realize
C
haven’t realized
D
hadn’t realized