摘要： Young trees must be looked after well.
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These young trees must ______.
A. look after well B. be look after well
C. be looked well D. be looked after well
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1These young trees must .
A. look after well B. be well looked after
C. take good care of D. be taken good care
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These young trees must_______.
[ ]
A. look after well
B. be look after well
C. be looked well after
D. be looked after well
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B. be look after well
C. be looked well after
D. be looked after well
These young trees must .
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| A．look after well | B．be well looked after |
| C．take good care of | D．be taken good care |
These young trees must .
| A．look after well | B．be well looked after |
| C．take good care of | D．be taken good care |