The Tibetans          in the Himalayas for centuries and have adjusted to the conditions at________.
#102472
A
has live; a such great height
B
have live; such a great height
C
has lived; a such great height
D
have lived; such a great height
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Drivers must stop when the traffic lights _____ red.
#99314
A
turn
B
will turn
C
turned
D
were turning
—Where is Mr Smith?—He   in prison for more than two months.
#102721
A
has been
B
has been sent
C
has been thrown
D
has been put
 I________ an important conference at 10 o’clock this Sunday morning.
#100889
A
will have attended
B
will be attending
C
have been attending
D
have attended