is he ________ his girlfriend was once a thief?
A. aware of
B. aware that
C. knowing that
D. aware of that
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1. we should ________ a good study habit of taking notes in class.
A. develop
B. improve
C. make
D. remain
1.“One dollar and eighty-seven cents,”which O. Henry repeatedly mentions in Gifts of the Magi, is _____.
A. [A]the money Della has been earning for months
B. [B]what Della has saved to buy herself a comb
C. [C]what Jim has given her for a Christmas present
D. [D]the money Della has saved to buy Jim a present
13 elements.In cold countries roofs slope steeply ______.
A.so that people can build caves under it
B.so that the roofs won't become so heavy
C.because people do not need snow to build the house
D.so that the snow can slide off easily
12.Houses in Arabia _______.
A.have thin walls painted white
B. B.are box-shaped
C.have many windows
D. D.always have water tanks on the roof
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