问题

the period of recent terroristactivities, people _____ not to touch an unattended bag

A:that
B:which
C:while
D:smoothly

正确答案是：

同类题型

I remember that,an old church on the top of the hill many years ago[ ]

Can you sing the song “ The Little Apple”—-Of course ! _______my parents _________I are able to sing it well.

To keep air clean, people in that city don’t ______fireworks now.

Some of them are _________ Chinese style.

_ you go , you will be warmlywelcomed .