The notice came around two in the afternoon _____ the meeting would be put off.

下列各句中，表达得体的一句是

Mrs.Smith finds it hard to clear up the mess，as her children are always ________ whenever she tries to. (2013·福建，29)

__________ in looking after three children athome, she no longer has time to enjoy the various activities in the club.

I ________know you were here. When did you arrive—At eight o’clock.