Over the past l00 years，sea level steadily as a result of global warming．
#103377
A
had increased
B
has been increasing
C
increased
D
is increasing
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With the development of modern society, E-mail as well as telephones an important part in daily communication.
#100960
A
have played
B
is playing
C
are playing
D
had played
While _____ to foreigners, you must try to make yourself _____ by using body language if necessary．
#103319
A
speaking? understand
B
spoken; understand
C
speaking; understood
D
spoken; understood
----Ten dollars, please!----How terrible! I ______ to bring my wallet with me.
#103730
A
was forgetting
B
forget
C
had forgotten
D
forgot
Computers in offices and homes since 1970s．
#99298
A
was
B
had been used
C
have been used
D
has been used