---It is high time that we _______ to school. ---If only the alarm clock _______! A. should go; rung B. shall go; had rung
.I just wonder _____ that makes him so excited.
Thanks to your help, ________ I would not have completed the task on time.
The conflict had developed into a stage ______ the two countries were gathering big troops on the border.
The schools themselves admit that not all children will be successful in the jobs ______ they are being trained.
______ scientists know where a storm will happen, winds will suddenly change, carrying the storm to a new direction.