用if, whether, when, 或how完成下列宾语从句
【小题1】Can you tell me ________ we will have the meeting this afternoon?
【小题2】I can't say ________ he will come on time or not.
【小题3】She asked me ________ I could help her with her English.
【小题4】I really don't know ________ you made the model ship by yourself.
【小题5】—Do you know ________ the train leaves?
—Yes. It leaves at nine o'clock.