______ without friends ______ the most difficult challenge for Chuck while living on the island.
#85606
A
How to survive, is
B
How does he survive, are
C
How does he survive, is
D
How to survive, are
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The factory produces half a million pairs of shoes every day, 85% ____ sold abroad.
#85579
A
of them are
B
of them is
C
of which is
D
of which are
The number of people who   a mobile phone   more than 650.
#85854
A
has, reaches
B
have, reach
C
has, reach
D
have, reaches
The Greens_____ in the room.
#43752
A
am
B
is
C
are
D
be