The pilot asked all the passengers on board to remain ___ as the plane was making a landing [ ]

Mary is always ready to do some __ work at the local geracomium（敬老院）in her spare time.

rents are advised to _______regular contact withchildren through phone calls, emails, texts or video chats

We have many cases where hard work as well as good communication skills have ___________ one’s chances of success in the past years.

下列各句中没有语病的一句是（ ）