—You may find the key to the math problem on page 107．—Ah, it's so simple． I wonder why I _ of that．
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A
hadn't thought
B
haven't thought
C
didn't think
D
wasn't thinking
推荐题目
.In the past five years Tomlison with his daughter _______all over the world.
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A
has travelled
B
traveled
C
have traveled
D
were traveling
Tom took out a piece of paper he and started reading in a clear tone.
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A
was preparing
B
would prepare
C
have prepared
D
had prepared
If I were in a movie, then it would be about time that I ____my head in my hands for a cry.
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A
bury
B
am burying
C
buried
D
would bury
— Lucy is not coming tonight. — But she _____!
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A
promised
B
will promise
C
had promised
D
promises
Amy insists that she ____ the secret to lose weight. But she won’t share it with us.
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A
had discovered
B
discovers
C
has discovered
D
will discover