一Did you notice a strange man just now?一Sorry，I ______of something else．
#63714
A
thought
B
was thinking
C
have thought
D
had thought
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—What a clean and bright classroom, isn’t it?—Yes, it’s always clean and bright because it every day.
#39281
A
cleans
B
cleaned
C
is cleaned
D
was cleaned
— You look scared. What happened?— Well , I _______ along the street ________ the UFO landed.
#40522
A
was walking ; while
B
is walking ; when
C
was walking ; when
D
is walking ; while
By the end of last month, I _____ all the CDs of Justin Bieber.
#42234
A
collect
B
collected
C
have collected
D
had collected
In the last few years, great changes _________to her, she is not the one that used to be.
#39966
A
happened
B
have been happened
C
have happened
D
were happened
— Have you had your breakfast yet?—Yes. Mom _____ it for me.
#39121
A
was cooking
B
is cooking
C
will cook
D
cooked