. When the teacher came in, the student pretended ________ his lessons.
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A
to do
B
to have done
C
to be doing
D
to be done
推荐题目
The factory ________ in the newspaper that they had some old machines for sale.
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A
selected
B
solved
C
designed
D
advertised
(2011·北京高考)It's important for the figures______regularly.
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A
to be updated
B
to have been updated
C
to update
D
to have updated
by his friends and relations，he decided to send his invention to the patent office to get recognition for his successful idea．
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A
Having pressed
B
Being pressed
C
Pressed
D
To be pressed
The mother felt herself cold and her hands trembled as she read the letter from the battlefield.
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A
grown
B
grow
C
to grow
D
to have grown