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單項(xiàng)選擇題

When mother entered the bed room, little Shelly pretended（）asleep.

A.having fallen
B.to be falling
C.being fallen
D.to have fallen

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單項(xiàng)選擇題

— Do you think I could borrow your calculator? —（）

A.Yes, help yourself.
B.It doesn’t matter.
C.Yes, you may borrow.
D.Yes, go on.

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Don't disturb me. I（）letters all morning and have written ten so far.

A.write
B.have written
C.was writing
D.have been writing