單項選擇題（）in the open air has given you a good color.

A.Work
B.Worked
C.Working
D.To be working


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2.單項選擇題When mother entered the bed room, little Shelly pretended（）asleep.

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

3.單項選擇題— 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.

4.單項選擇題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

5.單項選擇題Mr. Smith（）a most important part in the development of our city.

A. took 
B.had
C.played
D.made