–Bill is warm-hearted and works hard.—________ his sister Betty. 

 _______was not ______she took off her dark glasses _______I recognized her.

Will you deliver, _____ do I have to come to the shop to collect the goods？

Playing QQ’s “Happy Farm” by planting, watering, fertilizing, spraying, harvesting and selling of virtual vegetables, fruits and flowers, we can find out ________ all the excitement is about.

 No one knows exactly when our ancestors started talking，but new evidence suggests  _______might have happened a long time ago．