问题
Where is your sister?—–She _________ my mom with cooking.
A:is helping
B:helping
C:is help
D:helps
B:helping
C:is help
D:helps
正确答案是:
同类题型
A new bridge over the river now ,You can see many railway workers and engineers working every day.
She is wearing a blue coat _____ a Sunday morning.[ ]
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