[ Grammar ]
The burglar _____ to open the safe when he _____ the owner come in.
A. was trying / heard
B. tried / heard
C. had been trying / had heard
D. tried / was hearing

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A. and
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My birthday is _____ August.
A. in
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If plastic items are exposed ____________ sunlight for a long time, the color on them will fade.
A. in
B. to
C. with
D. under
