单项选择题

The branches could hardly ______ the weight of the fruit.

A．retain
B．sustain
C．maintain
D．remain
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He's watching TV He's ______ to be cleaning his room.
A．know
B．supposed
C．regarded
D．considered
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There's a whole of bills waiting to be paid.
A．stock
B．stack
C．number
D．sequence
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