It is reported that 40 percent of the land in Brazil________covered with trees.
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A
is
B
was
C
are
D
were
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(2013·兰州一中考前冲刺)It is the third time so far that such a festival________in my hometown.
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A
is held
B
has been held
C
will be held
D
had been held
A lot of people often forget that oral exams ______ to test our communicative ability．
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A
design
B
are designed
C
are designing
D
are being designed
The manager was worried about the press conference his assistant ______ in his place but luckily, everything was going on smoothly.
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A
gave
B
gives
C
was giving
D
had given