ack box is a necessary device on anairplane, which records its speed, direction and whether everything on theairplane______ normally

Mum, do you mind my listening to music for a while— . But please listen to it with your earphone.

You have my word that you shall have the certificate before you _____ this summer.[ ]

Itis reported that the police will soon ____ the case of two missing children

I’ll take part in the Speaking Competition next week. I’m so nervous that I’m afraid I can’t do very well. — _____.