The rate of racial progress varies in different areas of the country, but in the past ten years _________ more improvement.
#101835
A
there is
B
it is
C
there have been
D
there has been
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---What’s wrong with you, Mr. Keller? --- I’ve had a very bad headache for two days. At first, I ______ I caught a cold, but the medicine ______.
#102841
A
thought, hasn’t worked
B
had thought, didn’t work
C
thought, hadn’t worked
D
have thought, hasn’t worked
 The novel is said _____ into many languages.
#103269
A
being translated
B
having been translated
C
to translate
D
to have been translated
—Don’t forget to visit me when you come to    Beijing. —______.
#101055
A
I don’t
B
I won’t
C
I can’t
D
I haven’t