---Why would some workers in Foxcon die __________ continue working in the factory?  ---Psychologists say they are under too much pressure. 

I’m not sure if he _____ me . If I ________ , I will go with you.

_____ Mom had asked Jack to close the window  before he went out,______ he forgot to do it.

You will achieve nothing _        you work hard.

Tom was walking along the riverside when he heard someone calling him from behind. He turned around_______ found nothing.