– Why does she look so tired?-- She ________ all the morning and she still hasn’t finished it.
#104525
A
cleaned
B
was cleaning
C
has been cleaning
D
has cleaned
推荐题目
By the time Jack returned home from England, his son            from college.
#101871
A
graduated
B
has graduated
C
had been
D
had graduated
—Sorry. I ________ to post the letter for you. —Never mind. ________ it myself after school. 
#104473
A
forget; I’d rather post
B
forgot; I’ll post
C
forgot; I’m going to post
D
forget; I’d better post